// Clear Field
function clear_field(id,default_value){
	if(document.getElementById(id).value == default_value){
		document.getElementById(id).value = "";
	}
}

// Fill Field
function fill_field(id,default_value){
	if(document.getElementById(id).value == ""){
		document.getElementById(id).value = default_value;
	}
}

// Validate
function contact_us_validate(){
	form_valid = true;
	
	// Validate the fields
	if(document.contact_us.subject.value == "" || document.contact_us.subject.value == "Subject"){
		form_valid = false;
		alert("A subject is required.");
		document.contact_us.subject.focus();
	}else if(document.contact_us.sender_name.value == "" || document.contact_us.sender_name.value == "Your Name"){
		form_valid = false;
		alert("Your name is required.");
		document.contact_us.sender_name.focus();
	}else if(document.contact_us.email_address.value == "" || document.contact_us.email_address.value == "Email Address"){
		form_valid = false;
		alert("Your email address is required.");
		document.contact_us.email_address.focus();
	}else if(document.contact_us.message.value == "" || document.contact_us.message.value == "Message"){
		form_valid = false;
		alert("A message is required.");
		document.contact_us.message.focus();
	}
	
	// Return
	if(form_valid == false){
		return(false);
	}else{
		return(true);
	}
}