// JavaScript Document
function validateRegForm(theForm) {
	
  if (document.theForm.name.value.length < 2)
  {
    alert("Please enter your Name.");
    document.theForm.name.focus();
    return (false);
  }
  if (document.theForm.email.value.length < 4)
  {
    alert("Please enter your email address.");
    document.theForm.email.focus();
    return (false);
  }
	if (echeck(document.theForm.email.value)==false)
	{
    	document.theForm.email.focus();
		alert("The email address you entered is invalid.");
		return false;
	}
   if (document.theForm.phone.value.length < 10)
  {
    alert("Please enter your phone number.");
    document.theForm.phone.focus();
    return (false);
  }
   if (document.theForm.interest.value.length < 2)
  {
    alert("Please enter your area of interest.");
    document.theForm.interest.focus();
    return (false);
  }
   if (document.theForm.comments.value.length < 2)
  {
    alert("Please enter your message.");
    document.theForm.comments.focus();
    return (false);
  }
}

// ------------------------------------------
// check_email_format
// ------------------------------------------
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("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    //alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    //return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}