function hide(layName){
	if( navigator.appName.charAt(0)=="M"){
	document.all(layName).style.visibility="hidden";
	}
	if(navigator.appName.charAt(0)=="N"){
		if(navigator.appVersion.charAt(0)>=5){
		document.getElementById(layName).style.visibility="hidden";
		}
		else{
		document.layers[layName].visibility="hide";
		}
	}

}