function doNuhn() {}

function disableBack(){
	window.history.forward(1);
}

function toggleLayer(whichLayer)
{
	if (document.getElementById){
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"none";
	}
	else if (document.all){
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"none";
	}
	else if (document.layers){
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"none";
	}
}


function getRefToElement( elementId ){
	if( document.getElementById ) { return document.getElementById(elementId); }
	if( document.all ) { return document.all[elementId]; }
	return false
}

function setValue( elementId, newvalue ){
	var elementref = getRefToElement( elementId );
	elementref.value = newvalue;
}

function getValue( elementId ){
	var elementref = getRefToElement( elementId );
	if( elementref ) return elementref.value;
	return '';
}

function getRefToDiv(divID,oDoc) {
	if( document.getElementById ) { return document.getElementById(divID); }
	if( document.all ) { return document.all[divID]; }
	
	var elementref = getRefToElement( divID );
	if( !elementref )
	{
		if( !oDoc ) { oDoc = document; }
		if( document.layers ) {
			if( oDoc.layers[divID] ) {
				return oDoc.layers[divID];
			} else {
				for( var x = 0, y; !y && x < oDoc.layers.length; x++ ) {
					y = getRefToDiv(divID,oDoc.layers[x].document);
				}
				return y;
			}
		}
	}
	return false;
}

function showDiv(divID) {
	var myReference = getRefToDiv(divID);
	if( !myReference ) { return; }
	if( myReference.style ) { myReference.style.visibility = 'visible'; } else {
		if( myReference.visibility ) { myReference.visibility = 'show'; } else {
			return; } }
}

function hideDiv(divID) {
	var myReference = getRefToDiv(divID);
	if( !myReference ) { return; }
	if( myReference.style ) { myReference.style.visibility = 'hidden'; } else {
		if( myReference.visibility ) { myReference.visibility = 'hide'; } else {
			return; } }
}

function chDivClass(divID, classname ) {
	var myReference = getRefToDiv(divID);
	if( !myReference ){return;}
	if( myReference.className ) { myReference.className = classname; }
}