if( document.images )
{
//On & Off
  but1 = new Image(60,32) ;
  but1.src = "images/over_prev.gif";
  but2 = new Image(60,32) ;
  but2.src ="images/up_prev.gif"; 
	but3 = new Image(60,32) ;
  but3.src = "images/over_next.gif";
  but4 = new Image(60,32) ;
  but4.src ="images/up_next.gif"; 
//Add additional sets as needed
}

//<!--
function chkVer(imagename,objectsrc)
{
var n=navigator.appName
var v=parseInt(navigator.appVersion)
var browsok=((n=="Netscape")&&(v>=3))
var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
if ((browsok)||(browsok2))
	document.images[imagename].src=eval(objectsrc+".src")
}

//Popup Window
function open_popup(url,w,h) {
	pWindow = window.open(url,"popup",'toolbar=0,location=0,directories=0,status=0,menubar=0,width='+w+',height='+h+',scrollbars');	
	pWindow.focus();
}