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Why does my content load twice?

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http://www.daniweb.com – I have no clue why this is happening. When I load a certain page on my site, my content loads twice. Basically, my content appears to flash once. I can't figure out what's going on, but it seems to deal with the following code. The page calls urlCheck(). // display correct content function chooseContent(num) {         highlightButtons(num);         obj = document.getElementById('portSample' + num);         obj.style.display = 'block'; } // highlight the correct buttons relating to content. function highlightButtons(num) {                        obj = eval('document.port' + num);                 obj.src = portThumbActive[num-1];                 obj.name = ('active');                                 obj = eval('document.nav' + num);                 obj.src = navActive[num-1];                 obj.name = ('active'); } function urlCheck() {         // store url in a string         url = window.location.href;                 // check url for #1, #2 etc         for (var c=1; c<= portThumb.length; c++) {                 hashNum = url.search('#' + c);                 if (hashNum != -1) {                         obj =  document.getElementById('port' + c);                         strName = obj.name;                                                 // if correct content is already displayed, don't reload it.                         if (strName.search('active') == -1) {                                 chooseContent(c);                         }                 }         } } Let me know if you want more info. If a link to the page would be useful let me know. (General)