// * Dependencies * 
// this function requires the following snippets:
// JavaScript/readable_MM_functions/findObj
//
// Accepts a variable number of arguments, in triplets as follows:
// arg 1: simple name of a layer object, such as "Layer1"
// arg 2: ignored (for backward compatibility)
// arg 3: 'hide' or 'show'
// repeat...
//
// Example: showHideLayers(Layer1,'','show',Layer2,'','hide');

function findObj(n, d) { 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=findObj(n,d.layers[i].document); if(!x && d.getElementById) 
x=d.getElementById(n); return x; }

function showHideLayers() { var i,p,v,obj,args=showHideLayers.arguments; for (i=0;
 i<(args.length-2); i+=3) if ((obj=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; } }