function preview(elemid)
  { cp = document.getElementById('submenu');
    for(var i=0; i<cp.childNodes.length; i++) cp.childNodes[i].style.display = 'none';
    document.getElementById(elemid).style.display = 'block';
    return;
  }
  

function HideContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "block";
}
function ReverseContentDisplay(d,d2) {
if(d.length < 1) { return; }
if(document.getElementById(d).style.display == "none") {
	document.getElementById(d).style.display = "block";
	document.getElementById(d2).style.background = 'url(/gfx/active.png) no-repeat';
	}
else { 
	document.getElementById(d).style.display = "none"; 
	document.getElementById(d2).style.background = 'url(/gfx/inactive.png) no-repeat';
	}
}


function ReverseContentDisplay2(d,d2) {
if(d.length < 1) { return; }
if(document.getElementById(d).style.display == "block") {
	document.getElementById(d).style.display = "none";
	document.getElementById(d2).style.background = 'url(/gfx/inactive.png) no-repeat';
	}
else { 
	document.getElementById(d).style.display = "block"; 
	document.getElementById(d2).style.background = 'url(/gfx/active.png) no-repeat';
	}
}


var currentDiv = null;
var currentDiv2 = null;
            
function swapin(divName,divName2) {
	if(currentDiv != null) {
		document.getElementById(currentDiv).style.display = "none";
		document.getElementById(currentDiv2).style.background = 'url(/gfx/inactive.png) no-repeat';
	}
	currentDiv = divName;
	currentDiv2 = divName2;
	document.getElementById(currentDiv).style.display = "block";
	document.getElementById(currentDiv2).style.background = 'url(/gfx/active.png) no-repeat';

}


/* === SWAP SINGLE LAYER === */

function hide(d) {document.getElementById(d).style.display = "none";}
function show(d) {document.getElementById(d).style.display = "";}

function swap(d) {
if(document.getElementById(d).style.display == "none") {
	document.getElementById(d).style.display = "";
}else { 
	document.getElementById(d).style.display = "none"; }
}