获取地址栏中url后面携带的指定参数

//获取url参数
function GetUrlParam (paraName) {
	var url = window.location.href;
	var arrObj = url.split("?");
	if (arrObj.length > 1) {
		var arrPara = arrObj[1].split("&");
		var arr;
		for (var i = 0; i < arrPara.length; i++) {
			arr = arrPara[i].split("=");
			if (arr != null && arr[0] == paraName) {
				return arr[1];
			}
		}
		return "";
	}
	else {
		return "";
	}
}