javascript - having trouble overwriting querystring with history.PushState -

i can't figure out how correctly use push state. i'm getting weird url's so:

http://website.net/home?http://website.net/home=undefined&tab=browse

and can't seem work no matter try. need domain/path stay same, want rebuild querystring (which in function) apply history.pushstate()

here's basic @ code, abbreviated show problem in question.

var sk = {     //push function     pushstate: function(qs,callback){         var = 0, uri = '';         $.each(qs,function(k,v){             if(k=="" || v==""){                 delete qs[k];             }         });         $.each(qs,function(k,v){             if(i == 0){                 uri +='?';             }else{                 uri +='&';             }             uri +=k+'='+encodeuricomponent(v);             i++;         });         var obj ={ title: $('title').html(), url: uri }         if(typeof callback !== "undefined" && callback !== false){             obj[callback[0]] = callback[1];         }         history.pushstate(obj,obj.title,obj.url);     },      //parse current url , return querystring     getqsvars : function(){         var vars = {}, hash;         var hashes = window.location.href.slice(window.location.href.indexof('?') + 1).split('&');         for(var = 0; < hashes.length; i++)         {             hash = hashes[i].split('=');             vars[hash[0]] = hash[1];         }         return vars;     }, };