function cinema(screenname){
//var layerblnk = document.getElementById("blnk_screen");
//layerblnk.style.visibility = "visible";

switch (screenname){
		case "build" :
			var layerscreen1 = document.getElementById("build");	
			var layerscreen2 = document.getElementById("cyl_head");
			var layerscreen3 = document.getElementById("tour");		
			//layerblnk.style.visibility = "hidden";
			layerscreen1.style.visibility = "visible";
			layerscreen2.style.visibility = "hidden";
			layerscreen3.style.visibility = "hidden";
			break;
		case "cyl_head" :
			var layerscreen1 = document.getElementById("build");	
			var layerscreen2 = document.getElementById("cyl_head");
			var layerscreen3 = document.getElementById("tour");	
			//layerblnk.style.visibility = "hidden";
			layerscreen1.style.visibility = "hidden";
			layerscreen2.style.visibility = "visible";
			layerscreen3.style.visibility = "hidden";
			break;
		case "tour" :
			var layerscreen1 = document.getElementById("build");	
			var layerscreen2 = document.getElementById("cyl_head");	
			var layerscreen3 = document.getElementById("tour");	
			//layerblnk.style.visibility = "hidden";
			layerscreen1.style.visibility = "hidden";
			layerscreen2.style.visibility = "hidden";
			layerscreen3.style.visibility = "visible";
			break;
		default:
			;
}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function delayer(){
document.location = "index.asp?cbofile=41&ht=1&sh=4&cp=1"
}