var objRequest;
function queryString(pKey) {
	if(typeof objRequest != "object") {
		objRequest = new Object();
		var strQueryString = location.search.substring(1);
		if(strQueryString == "") {
			return
		}
		var arrPairs = strQueryString.split("&");
		var idx;
		var pos, thisKey, thisVal;
		for(idx = 0; idx < arrPairs.length; idx ++) {
			pos = arrPairs[idx].indexOf("=");
			if(pos == -1) continue;
			thisKey = arrPairs[idx].substring(0,pos);
			thisVal = arrPairs[idx].substring(pos+1);
			objRequest[thisKey] = thisVal;
		}
	}
	return objRequest[pKey];
}