javascript function - 获取URL参数

function getURLParam(strParamName) {
var strReturn = "";
var strHref = window.location.href;
if (strHref.indexOf("?") > -1) {
var strQueryString = strHref.substr(strHref.indexOf("?"));//Casesensitive
var aQueryString = strQueryString.split("&");
for (var iParam = 0; iParam < aQueryString.length; iParam++) {
if (aQueryString[iParam].indexOf(strParamName + "=") > -1) {
var aParam = aQueryString[iParam].split("=");
strReturn = aParam[1];
break;
}
}
}
return strReturn;