// JScript source code
function CheckMail(CampoEmail)
{
	var CheckMail=-1;
	var pos=-1;
	var dotpos=-1;
	var LastDotpos=-1;
	var mailStr=CampoEmail;	

	if (mailStr.length > 5)
	{
		pos = mailStr.indexOf("@");
		dotpos = mailStr.indexOf(".",(pos+1));
		LastDotpos = mailStr.lastIndexOf(".");
		if ((mailStr == "")	|| (pos == -1) ||(dotpos == -1)	|| (pos < 1)||((dotpos - (pos+1)) < 3)|| ((mailStr.length - (LastDotpos+1)) < 2 || (mailStr.length - (LastDotpos+1)) > 4))
		{		
			return false;
		}	
	}
	else
	{		
		return false;
	}
	
	return true;
}