function getStyle( layer ) {
	if( document.getElementById ) {
		return document.getElementById( layer ).style
		} 
	else if( document.all ) {
		return document.all[layer].style
		} 
	else {
		return document[layer]
		}
	}			
function writeText( layer,text ) {
	if( document.getElementById ) {
		obj = document.getElementById( layer );
		obj.innerHTML = text;
		alert('bla');
		document.normalize();
	} else if( document.all ) {
		document.all[layer].innerHTML = text;
	} else {
		document[layer].document.open();
		document[layer].document.write( text );
		document[layer].document.close();
	}
}

function toggleLayer(laag,modus,startwidth,stopwidth)	{
	getStyle(laag).visibility = modus;
	if(modus == 'visible')	{
		getStyle(laag).display = 'block';
		}
	else	{
		getStyle(laag).display = 'none';
		}
	}