var Dom = YAHOO.util.Dom;
var Event = YAHOO.util.Event;
var Anim = YAHOO.util.Anim;

YAHOO.util.Event.addListener("submit","click",function(e) {	
	document.getElementById('error').style.display = "none";
	var error = 0;	
	var form = document.getElementById('signupForm');
	
	if (form.name.value == "")
		error = 1;
		
	if (form.email.value == "")
		error = 1;
		
	if (!(emailValidate(form.email.value)))
		error = 1;
		
	if (form.comment.value == "")
		error = 1;
		
	if (error){
		document.getElementById('error').style.display = "block";
		YAHOO.util.Event.preventDefault(e);	
	}
});

function emailValidate(email){
    var emailRE = /^[a-zA-Z0-9_\+-]+(\.[a-zA-Z0-9_\+-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.([a-zA-Z]{2,4})$/;
    if (email.match(emailRE)){
        return true;
    }
    else {
        return false;
    }
}