function validform(emailStr)
	{
		if((document.feedback.username.value=="")||(document.feedback.username.value.charAt(0)==" "))
		{
			alert("Please enter name. The first character cannot be a blank space.");
			document.feedback.username.value="";
			document.feedback.username.focus();
			return false;
		}
if((emailStr=="")||(emailStr.charAt(0)==" "))
{
	alert("Please enter e-mail id. The first character cannot be a blank space.");
	document.feedback.email.value="";
	document.feedback.email.focus();
	return false;
}
	//rest of validation
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>\\@%&,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

var matchArray=emailStr.match(emailPat)
if (matchArray==null)
{
	alert("e-mail id seems incorrect (check @ and .'s)");
	document.feedback.email.focus();
	document.feedback.email.select();
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null)
{
    alert("The e-mail id does not seem to be valid.");
    document.feedback.email.focus();
    return false
}

var IPArray=domain.match(ipDomainPat)
if (IPArray!=null)
{
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address in e-mail id is invalid!")
	        document.feedback.email.focus();
		return false;
	    }
    }
    return true;
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null)
{
	alert("The domain name in e-mail id doesn't seem to be valid.");
	document.feedback.email.focus();
	document.feedback.email.select();
    return false;
}

var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3)
{
   // the address must end in a two letter or three letter word.
   alert("The e-mail id must end in a three-letter domain, or two letter country.");
   document.feedback.email.focus();
   return false;
}

// Make sure there's a host name preceding the domain.
if (len<2)
{
   var errStr="The e-mail id is missing a hostname!"
   alert(errStr);
   document.feedback.email.focus();
   return false;
}

		if((document.feedback.suggestions.value=="")||(document.feedback.suggestions.value.charAt(0)==" "))
		{
			alert("Please enter your feedback/suggestions. First character cannot be a blank space.");
			document.feedback.suggestions.focus();
			return false;
		}
		
return true;
}