function ShowLayer(d) {
document.getElementById('Sub_Menu_1').style.display = "none";
document.getElementById('Sub_Menu_2').style.display = "none"; 
document.getElementById('Sub_Menu_3').style.display = "none"; 
document.getElementById('Sub_Menu_4').style.display = "none"; 
document.getElementById('Sub_Menu_5').style.display = "none"; 
document.getElementById(d).style.display = "block";
}

function validate_form ( )
{
    valid = true;
    if ( document.F.firstName.value == "" )
    {
        alert ( "Please enter a First Name." );
		document.F.firstName.focus();
        valid = false;
    }
	if ( document.F.lastName.value == "" )
    {
        alert ( "Please enter an Last Name." );
		document.F.lastName.focus();
        valid = false;
    }
	if ( document.F.address.value == "" )
    {
        alert ( "Please enter a valid Address." );
		document.F.address.focus();
        valid = false;
    } 
	if ( document.F.city.value == "" )
    {
        alert ( "Please enter your City." );
		document.F.city.focus();
        valid = false;
    } 
	if ( document.F.zip.value == "" )
    {
        alert ( "Please enter your Postal Code." );
		document.F.zip.focus();
        valid = false;
    } 
	if ( document.F.phone.value == "" )
    {
        alert ( "Please enter a Phone Number." );
		document.F.phone.focus();
        valid = false;
    } 
	if ( document.F.email.value == "" )
    {
        alert ( "Please enter a valid Email Address." );
		document.F.email.focus();
        valid = false;
    } 
    return valid;
}