js 获得url参数

var get_urlparm={
int:function(parm_url){
if(parm_url){
this.url=parm_url
}
else{
this.url=window.location.href
}
this.get_obj()
},
get_obj:function(){
var url=this.url
var paraString =url.substring(url.indexOf("?") + 1, url.length).split("&");
var paraObj = {}
for (var i = 0; i < paraString.length; i++) {
var j = paraString[i]
paraObj[j.substring(0, j.indexOf("="))] = j.substring(j.indexOf("=") + 1, j.length);
}
console.log(JSON.stringify(paraObj))
}
}