function HideLayer(LayerName) {
	
	var targetElement;
	//Netscape 4
	if(document.layers) {
    	targetElement = document.layers(LayerName);
	}
	//IE6
	if(document.all) {
		targetElement = document.all(LayerName) ;
	}
	//Netscape 6
	if(!document.all && document.getElementById) {
		targetElement = document.getElementById(LayerName) ;
	}

	targetElement.style.display = "none" ;
    /*if (targetElement.style.display == "none") {
		
	} else {
		targetElement.style.display = "none" ;
	}*/
}