// *********** anzeige eines layers
function flashlayer_on(layer) 
 {
	document.getElementById(layer).style.visibility = "visible";
 }
	
// *********** ausblenden eines layers
function flashlayer_off(layer)
 {
	document.getElementById(layer).style.visibility = "hidden";
 }
 
function all_flashlayer_off()
 {
	document.getElementById("flash_1").style.visibility = "hidden";
	document.getElementById("flash_2").style.visibility = "hidden";
	document.getElementById("flash_3").style.visibility = "hidden";
	document.getElementById("flash_4").style.visibility = "hidden";				
 }