function MM_findObj(n, d) { //v4.01
  var p,i,x;
  if(!d) d=document;
  if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document;
        n=n.substring(0,p);
  }
  if(!(x=d[n])&&d.all)
        x=d.all[n];
  for (i=0;!x&&i<d.forms.length;i++)
        x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++)
        x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById)
        x=d.getElementById(n); return x;
}
function MM_showHideLayers() { //v3.0
  //Cla_hideLayers()
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3)
         if ((obj=MM_findObj(args[i]))!=null) {
                 v=args[i+2];
        if (obj.style) {
                        obj=obj.style;
                        v=      (v=='show')?'visible':
                                                        (v='hide') ? 'hidden': v;
                }
        obj.visibility=v;
        }
}
 
 var arr = ['L1','L2', 'L3', 'L4', 'L5'];
 
 function Cla_hideLayers(){
 
 if( document.all ){
        for( i=0; i<arr.length; i++){
                document.all[ arr[i] ].style.visibility = 'hidden';
        }
 } else {
        for( i=0; i<arr.length; i++){
                x = document.getElementById( arr[i] );
                x.style.visibility = 'hidden';
        }
 }
 
}