// 修改URL中指定参数的值

function changeURLArg(url,arg,arg_val){

    var pattern=arg+'=([^&]*)';

    var replaceText=arg+'='+arg_val;

    if(url.match(pattern)){

        var tmp='/('+ arg+'=)([^&]*)/gi';

        tmp=url.replace(eval(tmp),replaceText);

        return tmp;

    }else{

        if(url.match('[\?]')){

            return url+'&'+replaceText;

        }else{

            return url+'?'+replaceText;

        }

    }

    return url+'\n'+arg+'\n'+arg_val;

}

 // 删除url中某个参数

 function funcUrlDel(name){

     var loca = window.location;

     var baseUrl = loca.origin + loca.pathname + "?";

     var query = loca.search.substr();

     if (query.indexOf(name)>-) {

         var obj = {}

         var arr = query.split("&");

         for (var i = ; i < arr.length; i++) {

             arr[i] = arr[i].split("=");

             obj[arr[i][]] = arr[i][];

         };

         delete obj[name];

         var url = baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g,"").replace(/\:/g,"=").replace(/\,/g,"&");

         return url

     };

 }