function IsEmail(obj){
	var e = (obj.value).trim();
	ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
	for(i=0; i < e.length ;i++)
	{
		if(ok.indexOf(e.charAt(i))<0)
		{ 
			return (false);
		}	
	} 
	if (document.images)
	{
		re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
		re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		if (!e.match(re) && e.match(re_two))
		{
			return (true);		
		} 

	}
}

function setDisable(objectId, status){
	$(objectId).disabled = status;
}

function addClass(objectId, type){
	try {
	switch (type) {
		case 'error' : className = "Class_error";
		break;
		case 'warning' : className = "Class_warning";
		break;
		case 'sucess' : className = "Class_sucess";
		break;
		default : className = "";
		break;
	}
	$(objectId).setProperty('class', className);
	} catch (e) {}
}