function validate()
{
	name1=document.getElementById('name');
	email=document.getElementById('email');
	message=document.getElementById('message');
	if (name1.value=='')
	{
		alert("Please enter your name.");
		name1.focus();
		return false;
	}
	if (email.value=='')
	{
		alert("Please enter your email address.")
		email.focus();
		return false;
	}
	if (!echeck(email.value))
	{
		email.focus();
		return false;
	}
	if (message.value=='')
	{
		alert("Please enter your message.");
		message.focus();
		return false;
	}
	return true;	
}

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("Your email address is invalid, please verify and resubmit.")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Your email address is invalid, please verify and resubmit.")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert("Your email address is invalid, please verify and resubmit.")
	    return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
	    alert("Your email address is invalid, please verify and resubmit.")
	    return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	    alert("Your email address is invalid, please verify and resubmit.")
	    return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
	    alert("Your email address is invalid, please verify and resubmit.")
	    return false
	 }
		
	 if (str.indexOf(" ")!=-1){
	    alert("Your email address is invalid, please verify and resubmit.")
	    return false
	 }

 	 return true					
}