javascript 获取url中的参数

Request={QueryString:function(item){var svalue = location.search.match(new RegExp("[/?/&]" + item + "=([^/&]*)(/&?)","i"));return svalue ? svalue[1] : svalue;}}
OfficeSupplies.SelectOSGroup = function()
{
//debugger;
    var gid = Request.QueryString("GID1");
    if(gid!=null&&gid!=0)
    {
        ge("sltOSGroup1").value = gid;
        OfficeSupplies.ChangeGroup(1);
    }
    gid = Request.QueryString("GID2");
    if(gid!=null&&gid!=0)
    {
        ge("sltOSGroup2").value = gid;
        OfficeSupplies.ChangeGroup(2);
    }
    gid = Request.QueryString("GID3");
    if(gid!=null&&gid!=0)
    {
        ge("sltOSGroup3").value = gid;
    }
}