Get QueryString By Javascript

    function getQueryVariable(variable)
    {
        var query = window.location.search.substring(1);       
        var vars = query.split("&");
                
        for (var i=0;i<vars.length;i++)
        {  
            var pair = vars[i].split("=");                                       
            if (pair[0] == variable)
            {
                return pair[1];
            }
        }
    }


to get

var Str = getQueryVariable("QueryStringName");