获取URL里面传的参数,在Js中不能像后台一样使用Request.QueryString来获取URL里面参数，下面介绍两种方式用来获取参数
方式一：使用split分隔来获取，这种方法考试了地址中包含了returnUrl参数的形式，如果地址中本来就包含了另外一个网址，这个时候需要先过滤掉这个网址再去获取参数值，这里只考试另一个网址是最后一个参数的模式
function getParam(paramName,urlParamName) {
if(urlParamName==undefined||urlParamName==""){
urlParamName="returnurl";
}
paramValue = "";
isFound = false;
paramName = paramName.toLowerCase();
var arrSource = this.location.search.substring(1, this.location.search.length).split("&");
if (this.location.search.indexOf("?") == 0 && this.location.search.indexOf("=") > 1) {
if (paramName == urlParamName) {
var retIndex = this.location.search.toLowerCase().indexOf(urlParamName);
if (retIndex > -1) {
var returnUrl = unescape(this.location.search.substring(retIndex + 10, this.location.search.length));
if ((returnUrl.indexOf("http") != 0) && returnUrl != "" && returnUrl.indexOf(location.host.toLowerCase()) == 0) returnUrl = "http://" + returnUrl;
return returnUrl;
}
}
i = 0;
while (i < arrSource.length && !isFound) {
if (arrSource[i].indexOf("=") > 0) {
if (arrSource[i].split("=")[0].toLowerCase() == paramName.toLowerCase()) {
paramValue = arrSource[i].toLowerCase().split(paramName + "=")[1];
paramValue = arrSource[i].substr(paramName.length + 1, paramValue.length);
isFound = true;
}
}
i++;
}
}
return paramValue;
}
方式二：使用正则表达式获取
function QueryString(name) {
var result = location.search.match(new RegExp("[\?\&]" + name + "=([^\&]+)", "i"));
if (result == null || result.length < 1) {
return "";
}
return result[1];
}