function ShowElement(id)
{
 var e = document.getElementById(id);
 e.style.display = "block";
 e.style.visibility = "visible";
}

function HideElement(id)
{
 var e = document.getElementById(id);
 e.style.display = "none";
 e.style.visibility = "hidden";
}

function UpdateForm()
{
 var f = document.forms[0];
 
 if (f.ServicesProvided.selectedIndex == 0)  {
 	HideElement("GssServiceType");
	HideElement("CmsServiceType");
 }
 
 if (f.ServicesProvided.selectedIndex == 1)  {
 	ShowElement("GssServiceType");
	HideElement("CmsServiceType");
 }
 
 if (f.ServicesProvided.selectedIndex == 2)  {
 	ShowElement("CmsServiceType");
	HideElement("GssServiceType");
 }
}