function show(elem)
{
    var admindiv = document.getElementById('admin').style;
    admindiv.display = "none";

    var salesdiv = document.getElementById('sales').style;
    salesdiv.display = "none";

    var marketingdiv = document.getElementById('marketing').style;
    marketingdiv.display = "none";

    var supportdiv = document.getElementById('support').style
    supportdiv.display = "none";

    var servicediv = document.getElementById('service').style;
    servicediv.display = "none";

    var supportdiv = document.getElementById("support").style;
    supportdiv.display = "none";

    var partsdiv = document.getElementById("parts").style;
    partsdiv.display = "none";


    document.getElementById(elem).style.display = "block";
}

function checkrequired(which) 
{
	var pass = true;
	
	if (which.submitted) return false;
	
	if(	(document.getElementById('name').value == '') ||
		(document.getElementById('email').value == ''))
	{
			pass = false;
	}

	if (!pass)
	{
		alert("Please make sure you have filled all the required fields.");

		return false;
	}
	else
	{
		return true;
	}
}