function LayerMaster(Location,VisString) {

 if (VisString == 'hidden') { var InverseVisString='visible'; }
 if (VisString == 'visible') { var InverseVisString='hidden'; }

 var browser=navigator.appName;

 if (browser == 'Netscape' && document.all) {
 if (document.layers != null) {
        document.layers[Location].visibility=VisString;
        //document.layers['original'].visibility=InverseVisString;
		 }
 	}

 if (browser == 'Microsoft Internet Explorer') {
 if (document.all != null) {
        document.all[Location].style.visibility=VisString;
      //document.all['original'].style.visibility=InverseVisString;
		 }
 	}
}