function show_submenu(object) {
	
		if (document.getElementById) {
		
		document.getElementById(object).style.display = 'block';		
		}	

		else if (document.layers && document.layers[object]) {				
				document.layers[object].display = 'block';				
				}
		}

function hide_submenu(object) 

		{
			if (document.getElementById) 			
			{			
			document.getElementById(object).style.display = 'none';			
			}
				else if (document.layers && document.layers[object]) {
					document.layers[object].display = 'none';
					}
		}


function IsSubmitOk()
{
	var formulario = document.forms[0];
	var name = formulario.name.value;
	var email = formulario.email.value;
	var company = formulario.company.value;
	var comments = formulario.comments.value;

	
		if (email.indexOf ('@',0) == -1 || email.indexOf ('.',0) == -1)
		{
			alert ("Please enter a valid email address.")
			formulario.email.focus();
			return false;
		}
	
	if (name.length < 1)
	{
		alert('This field is required. Please enter a value.')
		formulario.name.focus();
		return false
	}	

	if (company.length < 1)
	{
		alert('This field is required. Please enter a value.')
		formulario.company.focus();
		return false
	}
	
	if (comments.length < 1)
	{
		alert('This field is required. Please enter a value.')
		formulario.comments.focus();
		return false
	}
		
	return true
}

function SubmitForm()
{
	if (IsSubmitOk())
		document.forms[0].submit();
		
}