function getParam(paramName) {     paramValue = "";     isFound = false;     if (this.location.search.indexOf("?") == 0 && this.location.search.indexOf("=") > 1) {         arrSource = unescape(this.location.search).substring(1, this.location.search.length).split("&");         i = 0;         while (i < arrSource.length && !isFound) {             if (arrSource[i].indexOf("=") > 0) {                 if (arrSource[i].split("=")[0].toLowerCase() == paramName.toLowerCase()) {                     paramValue = arrSource[i].split("=")[1];                     isFound = true;                 }             }             i++;         }     }     return paramValue; }