function redirector(url,did,tag1,tag2)
{
	var end_link;
	if (url!="")
	{
		end_link=url;
		if (did!="")
		{
			end_link=end_link+"?did="+did;
			if (tag1!="")
			{
				end_link=end_link+"&tag1="+tag1;
				if (tag2!="")
				{
					end_link=end_link+"&tag2="+tag2;
				}
			}
		}
		
	}

	if (end_link!="")
	{
		window.location.href=end_link;
	}
}