function hideOverlay()
{
	document.getElementById('overlay').style.display = "none";
}

function showOverlay()
{
	document.getElementById('overlay').style.display = "block";
}


function flagForm(element){
	$('#' + element).addClass("highlight");
	$('#' + element).blur(function(){
		flagFormRestore(element);
	});
	$('#' + element).focus();
}

function flagFormRestore(element){
	$('#' + element).removeClass("highlight");
}

function validateDownloadBrochure(){

	// check for missing values
	if ($('#company').val() == ''){
		alert("You did not enter a company name.");
		flagForm("company");
		return false;	
	} else if ($('#contact').val() == ''){
		alert("You did not enter a contact name.");
		flagForm("contact");
		return false;	
	} else if ($('#address1').val() == ''){
		alert("You did not enter an address.");
		flagForm("address1");
		return false;	
	} else if ($('#phone').val() == ''){
		alert("You did not enter a phone number.");
		flagForm("phone");
		return false;	
	} else if ($('#email').val() == ''){
		alert("You did not enter an email address.");
		flagForm("email");
		return false;	
	}
	
	// else allow form submission
	return true;

}