Mercurial > hg > fapweb
annotate ajax.js @ 842:8ec53995e64d
Preliminary javascript code for file uploads.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 25 Nov 2014 20:46:50 +0200 |
parents | 8bee2554d95e |
children | a385ac651d22 |
rev | line source |
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755 | 1 // |
2 // FAPWeb - Simple Web-based Demoparty Management System | |
3 // Common JavaScript / AJAX code | |
4 // (C) Copyright 2012-2014 Tecnic Software productions (TNSP) | |
5 // | |
6 | |
7 | |
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8 function jsCloseMessageBox(callback, cb_data) |
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9 { |
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10 var nitem = document.getElementById("messageBox"); |
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11 if (nitem && nitem.style.display != "none") |
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12 { |
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13 nitem.style.display = "none"; |
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14 |
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15 if (callback && typeof(callback) === "function") |
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16 callback(cb_data); |
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17 } |
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18 } |
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19 |
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20 |
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21 function jsMessageBox(msg) |
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22 { |
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23 var nitem = document.getElementById("messageBox"); |
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24 if (nitem) |
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25 { |
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26 nitem.innerHTML = "<div class='messageBoxInner'>"+ msg + |
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27 "<div class='messageBoxControls'>"+ |
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28 "<input id='msgBoxConfirmClose' type='button' value=' OK '>"+ |
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29 "</div></div>"; |
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30 |
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31 var elem = document.getElementById("msgBoxConfirmClose"); |
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32 elem.onclick = function () { jsCloseMessageBox(0, 0); } |
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33 |
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34 nitem.style.display = "block"; |
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35 } |
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36 } |
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37 |
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38 |
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39 function jsConfirmBox(msg, cb_ok, cb_cancel, cb_data) |
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40 { |
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41 var nitem = document.getElementById("messageBox"); |
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42 if (nitem) |
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43 { |
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44 nitem.innerHTML = "<div class='messageBoxInner'><h1>Confirmation</h1><p>"+ msg +"</p>"+ |
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45 "<div class='messageBoxControls'>"+ |
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46 "<input id='msgBoxConfirmCancel' type='button' value=' Cancel '>"+ |
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47 "<input id='msgBoxConfirmOK' type='button' value=' OK '>"+ |
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48 "</div></div>"; |
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49 |
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50 var elem = document.getElementById("msgBoxConfirmCancel"); |
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51 elem.onclick = function () { jsCloseMessageBox(cb_cancel, cb_data); } |
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52 |
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53 elem = document.getElementById("msgBoxConfirmOK"); |
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54 elem.onclick = function () { jsCloseMessageBox(cb_ok, cb_data); } |
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55 |
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56 nitem.style.display = "block"; |
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57 } |
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58 } |
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59 |
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60 |
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61 function jsStatusMsg(msg) |
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62 { |
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63 var nitem = document.getElementById("nstatus"); |
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64 if (nitem) nstatus.innerHTML = msg; |
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65 } |
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66 |
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67 |
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68 function strtrim(str) |
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69 { |
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70 if (!str || str == null) |
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71 return ""; |
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72 return str.replace(/^\s+|\s+$/g,'') |
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73 } |
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74 |
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75 |
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76 function strencode(str) |
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77 { |
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78 return encodeURIComponent(str); |
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79 } |
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80 |
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81 |
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82 function jsCreateXMLRequest() |
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83 { |
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84 var req; |
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85 if (window.XMLHttpRequest) |
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86 { |
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87 // Modern browsers |
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88 req = new XMLHttpRequest(); |
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89 } |
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90 else |
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91 { |
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92 // Old IE versions |
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93 req = new ActiveXObject("Microsoft.XMLHTTP"); |
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94 } |
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95 return req; |
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96 } |
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97 |
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98 |
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99 // |
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100 // Function for creating AJAX POST request arguments list based |
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101 // on fields and giving them specified types. Also basic check |
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102 // for validity can be performed (e.g. field empty or not) |
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103 // |
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104 var lastPostArgs = Object(); |
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105 function jsMakePostArgs(fields, fprefix, fsuffix, nofail) |
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106 { |
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107 var res = []; |
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108 lastPostArgs = Object(); |
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109 |
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110 for (var id in fields) |
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111 { |
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112 var elname = fprefix + id + fsuffix; |
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113 switch (fields[id]) |
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114 { |
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115 case 4: |
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116 elname += "Sel"; |
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117 break; |
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118 } |
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119 |
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120 var elem = document.getElementById(elname); |
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121 if (!elem && !nofail) |
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122 { |
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123 jsMessageBox("No such DOM element '"+ elname +"'."); |
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124 return ""; |
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125 } |
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126 |
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127 if (elem) |
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128 { |
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129 switch (fields[id]) |
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130 { |
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131 case 1: |
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132 var vstr = strtrim(elem.value); |
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133 res.push(id+"="+strencode(vstr)); |
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134 lastPostArgs[id] = vstr; |
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135 break; |
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136 |
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137 case 2: |
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138 var vint = parseInt(strtrim(elem.value)); |
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139 res.push(id+"="+vint); |
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140 lastPostArgs[id] = vint; |
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141 break; |
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142 |
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143 case 3: |
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144 res.push(id+"="+(elem.checked ? "1" : "0")); |
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145 lastPostArgs[id] = elem.checked; |
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146 break; |
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147 |
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148 case 4: |
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149 var vval = (elem.selectedIndex != -1) ? elem.options[elem.selectedIndex].value : -1; |
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150 res.push(id+"="+vval); |
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151 lastPostArgs[id] = vval; |
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152 break; |
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153 |
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154 default: |
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155 jsMessageBox("Unsupported field type in "+ elname); |
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156 return ""; |
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157 } |
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158 } |
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159 } |
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160 return res.join("&"); |
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161 } |
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162 |
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163 |
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164 function jsGetValue(elname, eltype) |
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165 { |
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166 var elem = document.getElementById(elname); |
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167 if (!elem) |
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168 { |
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169 jsMessageBox("No such DOM element '"+ elname +"'."); |
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170 return ""; |
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171 } |
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172 |
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173 switch (eltype) |
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174 { |
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175 case 1: |
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176 var vstr = strtrim(elem.value); |
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177 return strencode(vstr); |
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178 |
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179 case 2: |
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180 var vint = parseInt(strtrim(elem.value)); |
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181 return vint; |
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182 |
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183 case 3: |
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184 return elem.checked ? "1" : "0"; |
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185 |
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186 case 4: |
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187 if (elem.selectedIndex != -1) |
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188 return elem.options[elem.selectedIndex].value; |
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189 else |
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190 return null; |
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191 |
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192 default: |
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193 jsMessageBox("Unsupported field type in "+ elname); |
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194 return ""; |
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195 } |
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196 } |
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197 |
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198 |
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199 function jsShowPreviewImage(file) |
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200 { |
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201 var nitem = document.getElementById("messageBox"); |
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202 if (nitem) |
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203 { |
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204 nitem.innerHTML = "<div class='imageBoxInner'>"+ |
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205 "<img src='"+file+"' alt='"+file+"' />"+ |
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206 "</div>"; |
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207 |
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208 var elem = document.getElementById("messageBox"); |
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209 elem.onclick = function () { jsCloseMessageBox(0, 0); } |
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210 |
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211 nitem.style.display = "block"; |
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212 |
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213 return false; |
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214 } |
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215 |
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216 return true; |
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217 } |
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218 |
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219 |
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220 function jsFormatSize(bytes) |
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221 { |
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222 var suffixes = ["Bytes", "KiB", "MiB"]; |
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223 var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024))); |
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224 return (bytes / Math.pow(1024, i)).toFixed(1) +' '+ suffixes[i]; |
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225 } |
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226 |
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227 |
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228 function jsFileUploadSelected(id, maxSize) |
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229 { |
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230 } |
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231 |
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232 |
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233 function jsStartFileUpload(id, tgt) |
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234 { |
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235 var elem = document.getElementById(id); |
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236 //var fd = document.getElementById(id).getFormData(); // for FF3 |
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237 var fd = new FormData(elem); |
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238 |
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239 var req = jsCreateXMLRequest(); |
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240 req.upload.addEventListener('progress', jsUploadProgress, false); |
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241 req.addEventListener('load', jsUploadFinished, false); |
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242 req.addEventListener('error', jsUploadError, false); |
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243 req.addEventListener('abort', jsUploadAbort, false); |
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244 req.open('POST', tgt); |
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245 req.send(fd); |
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246 } |
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247 |
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248 |
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249 function jsUploadProgress(e) |
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250 { |
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251 if (e.lengthComputable) |
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252 { |
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253 var complete = Math.round(e.loaded * 100 / e.total); |
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254 if (complete < 100) |
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255 jsStatusMsg("Uploaded "+ complete.toString() +'%, '+ jsFormatSize(e.loaded)); |
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256 else |
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257 jsStatusMsg("Upload finished ..."); |
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258 } |
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259 } |
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260 |
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261 |
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262 function jsUploadFinished(e) |
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263 { |
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264 jsMessageBox(e.target.responseText); |
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265 } |
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266 |
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267 |
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268 function jsUploadError(e) |
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269 { |
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270 jsMessageBox("Error occured while uploading."); |
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271 } |
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272 |
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273 |
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274 function jsUploadAbort(e) |
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275 { |
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276 jsMessageBox("File upload aborted."); |
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Preliminary javascript code for file uploads.
Matti Hamalainen <ccr@tnsp.org>
parents:
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