function?getParam(paramName)?{
????paramValue?=?"",?isFound?=?!1;
????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)?arrSource[i].indexOf("=")?>?0?&&?arrSource[i].split("=")[0].toLowerCase()?==?paramName.toLowerCase()?&&?(paramValue?=?arrSource[i].split("=")[1],?isFound?=?!0),?i++
????}
????return?paramValue?==?""?&&?(paramValue?=?null),?paramValue
}