jQuery获取url参数值

$.extend({
getUrlVars: function () {
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for (var i = 0; i < hashes.length; i++) {
hash = hashes[i].split('=');
vars.push(hash[0]);
vars[hash[0]] = hash[1];
}
return vars;
},
getUrlVar: function (name) {
return $.getUrlVars()[name];
}
});

//获取参数对象
alert($.getUrlVars());
//获取参数a的值
alert($.getUrlVar('a'));