function handleFocus(element)   {   
    if (element.value == element.defaultValue) {   
        element.value = '';
    }   
}   
  
function handleBlur(element) {   
 	if (element.value == '') {   
        element.value = element.defaultValue;   
    }   
} 

function isValidEmail(field) {
   var str = field.value;
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
}

function validate_required(field,hint) {
with (field)
  	{
 	if (value==null||value==""||value==hint) {
		return false;
	} else {
    	return true;
    }
  }
}

function validate () {
	// check that mandatory values have been entered

	var hint_name = "Your Name";
	var hint_email = "Your Email";
	var hint_phone = "Your Phone";
	var form = document.getElementById('contactfrm');
	var message ="";

	if (validate_required(form.name,hint_name)==false) message +="Name\n";
	
	if (validate_required(form.email,hint_email)==false) {
		message +="Email\n"; 
	} else{
		if (isValidEmail(form.email)==false) message +="Email\n";
	}
	
	if (validate_required(form.phone,hint_phone)==false) message +="Phone\n";

	if ( message !="") {
		alert("The following manadatory values must be entered:\n" + message );
		return false;
	} else {
		prepareSubmit();
	}
}

function prepareSubmit() {
	// need to consolidate all details into the contents field

	var hint_message = "Your Message";
	var form = document.getElementById('contactfrm');
	var body = "Name: " + form.name.value + "\n";
	body += "Email: " + form.email.value + "\n";
	body += "Phone: " + form.phone.value + "\n";

	if (form.message.value == hint_message) {
		body += "Message: <blank>";
	} else {
		body += "Message: " + form.message.value;
	}
	
	form.contents.value = body;
	return true;
}