function MM_showHideLayers(){ 

	var args = MM_showHideLayers.arguments;
	var oObj;
  
	for (i=0; i<(args.length-2); i+=3 ){

			//alert(args[i] + ' ' + args[i+2]);

		oObj = window.document.getElementById(args[i]);
		if(oObj!=null){
			if(args[i+2]=='hide'){
				oObj.style.visibility = 'hidden';
				oObj.style.zIndex = '-50';
			}else{
				oObj.style.visibility = 'visible';
				oObj.style.zIndex = '2000';
			}
		}
	}
}