function switchModel(make) {

  var selectedmake = make.options[make.selectedIndex].value;

  if(document.getElementById)
	{
		var el = document.getElementById(selectedmake);
		var ar = document.getElementById("modeldiv").getElementsByTagName("select"); 
		var dummy = document.getElementById("dummy");
		if(el.style.display != "block")
		{ 	for (var i=0; i<ar.length; i++){
				if (ar[i].className=="model") 
				ar[i].style.display = "none";
				ar[i].disabled = true;
			}	
			dummy.style.display = "none";
			el.style.display = "block";
			el.disabled = false;
		}
		else
		{
			el.style.display = "none";
		}
	}
	
	
}

function switchModel2(make) {

  var selectedmake = make.options[make.selectedIndex].value;

  if(document.getElementById)
	{
		var el = document.getElementById(selectedmake);
		var ar = document.getElementById("masterdiv").getElementsByTagName("select"); 
		var dummy = document.getElementById("dummy");
		if(el.style.display != "block" || el.style.display != "inline")
		{ 	for (var i=0; i<ar.length; i++){
				if (ar[i].className=="model") 
				ar[i].style.display = "none";
				ar[i].disabled = true;
			}	
			dummy.style.display = "none";
			el.style.display = "inline";
			el.disabled = false;
		}
		else
		{
			el.style.display = "none";
		}
	}
	
	
}