isDOM=document.getElementById //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
//+
var myimages=new Array() 
function preloadimages()
{ 
if(isDOM)
{
	for (i=0;i<preloadimages.arguments.length;i++)
		{ 
			myimages[i]=new Image();
			myimages[i].src=preloadimages.arguments[i];
		} 
}
}
//+
function act(actor)
{
if(isDOM){
	imaga=actor.substr(0,actor.length);
	buffer=eval("document."+actor+".src");
	xbuffer=buffer.substr(buffer.length-7,7);
	if(xbuffer=='_on.gif')
	{ 
		eval("document."+actor+".src='images/"+imaga+".gif'");
	}
	else
	{
		 eval("document."+actor+".src='images/"+imaga+"_on.gif'");
	}
}
}
//+