Javascript 获取浏览器URL参数

(function( window ){

var pageUtils = {

//TODO 获取浏览器URL当前请求出参数
//Key 当前需要取参数的Key，不传返回所有参数对象
getRequest : function( key ){

var paramUrl = decodeURIComponent(location.search.substr(1) );

if(!paramUrl)return null;

var paramObj = {};

//通过正则表达式替换为标准JSON字符串
var replaceUrl = paramUrl.replace(/=/g,'":"').replace(/&/g,'","');

replaceUrl = '{"' + replaceUrl + '"}';

try{
paramObj = JSON.parse( replaceUrl );

}catch(e){

//JSON转换失败通过传统方式取值
var paramArray = paramUrl.split("&");

for(var i = 0 ; i < paramArray.length ; i++){

var paramItem = paramArray[i];

if( paramItem.indexOf("=") > 0){

paramObj[paramItem.split("=")[0]] = paramItem.split("=")[1];
}
}
}
if( key ) return paramObj[key];

return paramObj;
}

};

window.pageUtils = pageUtils;

})( window );