js前端获取页面传递的参数

UrlParm = function () { // url参数
var data, index;
(function init() {
data = [];
index = {};
var u = window.location.search.substr(1);
if (u != '') {
var parms = decodeURIComponent(u).split('&');
for (var i = 0, len = parms.length; i < len; i++) {
if (parms[i] != '') {
var p = parms[i].split("=");
if (p.length == 1 || (p.length == 2 && p[1] == '')) {
data.push(['']);
index[p[0]] = data.length - 1;
} else if (typeof (p[0]) == 'undefined' || p[0] == '') {
data[0] = [p[1]];
} else if (typeof (index[p[0]]) == 'undefined') { // c=aaa
data.push([p[1]]);
index[p[0]] = data.length - 1;
} else {// c=aaa
data[index[p[0]]].push(p[1]);
}
}
}
}
})();
return {
// 获得参数,类似request.getParameter()
parm: function (o) { // o: 参数名或者参数次序
try {
return (typeof (o) == 'number' ? data[o][0] : data[index[o]][0]);
} catch (e) {
}
},
//获得参数组, 类似request.getParameterValues()
parmValues: function (o) { //  o: 参数名或者参数次序
try {
return (typeof (o) == 'number' ? data[o] : data[index[o]]);
} catch (e) { }
},
//是否含有parmName参数
hasParm: function (parmName) {
return typeof (parmName) == 'string' ? typeof (index[parmName]) != 'undefined' : false;
},
// 获得参数Map ,类似request.getParameterMap()
parmMap: function () {
var map = {};
try {
for (var p in index) { map[p] = data[index[p]]; }
} catch (e) { }
return map;
}
}
} ();

var  idx = UrlParm.parm('IDX');