Js gets the url parameter code instance to share the url of the of js operation

The code is very simple, the main idea is to resolve the url parameters to js object, and then do add, delete, change, look up operations is very convenient ~, here to take notes.

var LG=(function(lg){
    var objURL=function(url){
        this.ourl=url||window.location.href;
        this.href="";//? The front part
        this.params={};//Url parameter object
        this.jing="";//# and the rest
        this.init();
    }
    //Analyze the url and get? Save this.href in front, resolve the parameter as this.params object, and save this.jing after the # sign
    objURL.prototype.init=function(){
        var str=this.ourl;
        var index=str.indexOf("#");
        if(index>0){
            this.jing=str.substr(index);
            str=str.substring(0,index);
        }
        index=str.indexOf("?");
        if(index>0){
            this.href=str.substring(0,index);
            str=str.substr(index+1);
            var parts=str.split("&");
            for(var i=0;i<parts.length;i++){
                var kv=parts[0].split("=");
                this.params[kv[0]]=kv[1];
            }
        }
        else{
            this.href=this.ourl;
            this.params={};
        }
    }
    //Just modify this.params
    objURL.prototype.set=function(key,val){
        this.params[key]=val;
    }
    //Just set this.params
    objURL.prototype.remove=function(key){
        this.params[key]=undefined;
    }
    //The resulting url is composed of three parts
    objURL.prototype.url=function(){
        var strurl=this.href;
        var objps=[];//I'm going to use an array here, and then I'm going to do join
        for(var k in this.params){
            if(this.params[k]){
                objps.push(k+"="+this.params[k]);
            }
        }
        if(objps.length>0){
            strurl+="?"+objps.join("&");
        }
        if(this.jing.length>0){
            strurl+=this.jing;
        }
        return strurl;
    }
    //Get the parameter value
    objURL.prototype.get=function(key){
        return this.params[key];
    }    
    lg.URL=objURL;
    return lg;
}(LG||{}));

LG is just my personal common JS namespace, without him. Call:

var myurl=new LG.URL("http://www.baidu.com?a=1");

    myurl.set("b","hello"); //Add the b = hello
    alert (myurl.url());

    myurl.remove("b"); //Remove the b

    alert(myurl.get ("a"));//Take the value of parameter a, and you get 1 here

    myurl.set("a",23); //Modify the value of a to be 23

    alert (myurl.url());