function CheckEmail(input) 
	{
		var LenInput = input.length;
		var posat = -1;
		var posdot = -1;
		var chAddr = "";
		var indexdot = 0;

		for(var i = 0; i < LenInput; i++)
		{
			chAddr = input.charAt(i);

			if(chAddr == '@')
			{
				if(i == 0 || i == LenInput-1)
					return false;
				posat = i;
			}
			else if(chAddr == '.')
			{
				
				if(i == 0 || i == LenInput-1)
					return false;
				else 
				{
					if(i == posdot + 1 || i == LenInput-1)
						return false;
					posdot = i;
					indexdot = indexdot + 1
					
					if(indexdot > 3)
						return false;
				}
			}
		}         
		
		if (input == "" || posat == -1 || posat == LenInput-1 || posdot == -1 || posdot == LenInput-1)
		   	return false;
		else
			return true;
		
	}