function layerSetup(id,visibility){
	if(document.getElementById){
	this.obj = document.getElementById(id).style;
	this.obj.visibility = visibility;
	return this.obj;}
	else if(document.all){
	this.obj = document.all[id].style;
	this.obj.visibility = visibility;
	return this.obj;}
	else if(document.layers){
	this.obj = document.layers[id];
	this.obj.visibility = visibility;
	return this.obj;}
	}
	function visVisible(param){
	new layerSetup(param,'visible');
	}
	
	function visHidden(param){
	new layerSetup(param,'hidden');
	}