function _hover (id, class_name)
    {
	document.getElementById(id).className = class_name;
    }
		    

	function key_enter(e)
	{

		if (!e) e = window.event || null; 

		if (typeof(key_enter)!="function" || !e) return;
 
		var n = e.keyCode?e.keyCode:e.charCode;
	
		if (n==13) document.getElementById('frm').submit();

	}