function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		
		if (str.indexOf(at)==-1)
		{
		   alert("Please enter a valid e-mail address.")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
		{
		   alert("Please enter a valid e-mail address.")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
		{
		    alert("Please enter a valid e-mail address.")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1)
		 {
		    alert("Please enter a valid e-mail address.")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
		 {
		    alert("Please enter a valid e-mail address.")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1)
		 {
		    alert("Please enter a valid e-mail address.")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1)
		 {
		    alert("Your e-mail address is invalid. Please re-enter your e-mail address without spaces (e.g. ndtac@air.org).")
		    return false
		 }

 		 return true					
	}


function verifyRequired()
{
var emailID = document.feedback.Email
	var emailIDConfirm = document.feedback.Confirm_Email

	
	if (document.feedback.First_Name.value=="")
	{
		alert("Please enter your first name.")
		document.feedback.First_Name.focus()
		return false
	}

	if (document.feedback.Last_Name.value=="")
	{
		alert("Please enter your last name.")
		document.feedback.Last_Name.focus()
		return false
	}

	if ((emailID.value==null)||(emailID.value=="") || (emailIDConfirm.value==null)||(emailIDConfirm.value==""))
	{
		alert("Your e-mail address is required to complete registration. Please enter a valid e-mail address.")
		emailID.focus()
		return false
	}
	
	if (echeck(emailID.value)==false)
	{
		emailID.focus()
		return false
	}

	if (echeck(emailIDConfirm.value)==false)
	{
		emailIDConfirm.focus()
		return false
	}


	if (emailID.value != emailIDConfirm.value) 
	{
	    alert("Please check that the e-mail addresses match.");
	    return false;
	}
	
	return true	
 }


function verifyRequired2()
{
	var emailID = document.feedback.Email
	var emailIDConfirm = document.feedback.Confirm_Email

	if ((document.feedback.Attend1.checked==false)&&(document.feedback.Attend2.checked==false)&&(document.feedback.Attend3.checked==false))
	{
		alert("Please indicate your attendance plans in the first question.")
		return false
	}

	if (document.feedback.First_Name.value=="")
	{
		alert("Please enter your first name.")
		document.feedback.First_Name.focus()
		return false
	}

	if (document.feedback.Last_Name.value=="")
	{
		alert("Please enter your last name.")
		document.feedback.Last_Name.focus()
		return false
	}

	if ((emailID.value==null)||(emailID.value=="") || (emailIDConfirm.value==null)||(emailIDConfirm.value==""))
	{
		alert("Your e-mail address is required to complete registration. Please enter a valid e-mail address.")
		emailID.focus()
		return false
	}
	
	if (echeck(emailID.value)==false)
	{
		/*emailID.value=""*/
		emailID.focus()
		return false
	}

	if (echeck(emailIDConfirm.value)==false)
	{
		/*emailIDConfirm.value=""*/
		emailIDConfirm.focus()
		return false
	}


	if (emailID.value != emailIDConfirm.value) 
	{
	    alert("Please check that the e-mail addresses match.");
	    return false;
	}
	
	return true
	
 }