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1 | <public:component> |
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2 | <public:attach event="onpropertychange" onevent="propertyChanged()" /> |
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3 | <script> |
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4 | |
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5 | var supported = /MSIE (5\.5)|[6789]/.test(navigator.userAgent) && navigator.platform == "Win32"; |
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6 | var realSrc; |
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7 | var blankSrc = "blank.gif"; |
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8 | |
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9 | if (supported) fixImage(); |
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10 | |
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11 | function propertyChanged() { |
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12 | if (!supported) return; |
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13 | |
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14 | var pName = event.propertyName; |
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15 | if (pName != "src") return; |
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16 | // if not set to blank |
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17 | if ( ! new RegExp(blankSrc).test(src)) |
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18 | fixImage(); |
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19 | }; |
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20 | |
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21 | function fixImage() { |
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22 | // get src |
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23 | var src = element.src; |
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24 | |
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25 | // check for real change |
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26 | if (src == realSrc) { |
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27 | element.src = blankSrc; |
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28 | return; |
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29 | } |
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30 | |
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31 | if ( ! new RegExp(blankSrc).test(src)) { |
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32 | // backup old src |
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33 | realSrc = src; |
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34 | } |
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35 | |
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36 | // test for png |
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37 | if ( /\.png$/.test( realSrc.toLowerCase() ) ) { |
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38 | // set blank image |
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39 | element.src = blankSrc; |
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40 | // set filter |
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41 | element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + |
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42 | src + "',sizingMethod='scale')"; |
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43 | } |
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44 | else { |
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45 | // remove filter |
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46 | element.runtimeStyle.filter = ""; |
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47 | } |
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48 | } |
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49 | |
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50 | </script> |
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51 | </public:component> |
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