function is_valid_email(email)
{
  return /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test(email);
}

function validateERF()
{

	var formobj = document.request_form;
	var checked = 0;

	for(var i=0; i < formobj.elements["event_type[]"].length; i++){
		if (formobj.elements["event_type[]"][i].checked){
			checked++;
		}
	}


	
	if (formobj.name.value == '' || formobj.email.value == '' || formobj.telephone1.value == '' || formobj.telephone2.value == '' || formobj.telephone3.value == '')
	{

		document.getElementById("required").innerHTML = 
                "Please be sure to fill in all fields.";
		return false;
	}
	else if (is_valid_email(formobj.email.value) == false) {
			document.getElementById("required").innerHTML = 
				"Invalid email address.";
			//window.scrollTo(0,0);
			return false;	
	}
	else if (checked==0) {
			document.getElementById("required").innerHTML = 
				"Please select an event type.";
			//window.scrollTo(0,0);
			return false;	
	}
	else
	{
		return true;
	}
}

// automatically move to next phone number field
function moveNext(input) {
	var maxlength = input.maxlength;
	if(input.value.length >= input.maxLength)
	{
		input.form[(getIndex(input)+1)].focus();
	}
}
function getIndex(input) {
	var index = -1, i = 0, found = false;
	while (i < input.form.length && index == -1)
		if (input.form[i] == input)index = i;
		else i++;
	return index;
}