function isEmailValid(str){
   if(str.indexOf(".") > 2 && str.indexOf("@") > 0){
	   return true;
   }
   else{
	   return false;
   }
}

function validateForm(){
	doc = document.pageForm;
	if(doc.fromName.value==""){
		alert("Please provide your name.");
		doc.fromName.focus();
		return false;
	}
	else if(doc.emailMessage.value==""){
		alert("Please provide a message to send.");
		doc.emailMessage.focus();
		return false;
	}
	
	if(doc.fromEmailAddress.value!=""){
		if(!isEmailValid(doc.fromEmailAddress.value)){
			alert("Please provide a valid email address.");
			doc.fromEmailAddress.focus();
			return false;
		}
	}
	doc.submit();
}