[Sergei-b84]

Вот без ajax проверки. Залогиниться могу

function check_email()
{
var email = $("#email").val();
    
    if (email == "")
    {
        $("#email_error").show();
        return false;
    }
    else
    {
        if (validateEmail(email))
        {
		
			$("#email_error").hide();
			return true;
        }
        else
        {
             $("#email_error").show();
			 $("#email_error").html("Please enter an email address in the following format [email]ani@lookingschools.com[/email]");
             return false;
        }
    }
}

function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
}