if (document.images) { 
   	        var arrow_off=new Image();
	   	arrow_off.src="./images/arrow_off.gif";
	   	
		var arrow_on=new Image();
	   	arrow_on.src="./images/arrow_on.gif";
	   	
}


// changeImages creates the rollover
function changeImages() {
	if (document.images) { 
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
		}
	}
}