function AddSubID(link, name) { 
	var link_string = link.href;
	var split = link_string.split("?"); 
	link_string = (split.length>1) ? '&' : '?';
	link_string = link.href+link_string+name+'=';
	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] == name) { 
			link_string = link_string + pair[1]; 
		} 
	}
	
	link.href = link_string;
}