imgroll = new Array();

imgroll[0] = "";// ok to leave empty
imgroll[1] = "pur-09-headlines";
imgroll[2] = "pur-09-features";

onimages = [];
offimages = [];

for(i=0; i < imgroll.length; i++){
	onimages[i] =  new Image();
	onimages[i].src = "http://grfx.cstv.com/schools/pur/graphics/"+imgroll[i]+"-on.gif";
	offimages[i] =  new Image();
	offimages[i].src = "http://grfx.cstv.com/schools/pur/graphics/"+imgroll[i]+"-off.gif";
}

function imgOn(imageName) {
	num = imageName.split("e");
	document[imageName].src = onimages[num[1]].src;
	setTimeout( "document['" + imageName + "'].src = onimages['" + num[1] + "'].src", 1 );
}

function imgOff(imageName) {  
	num = imageName.split("e");
	document[imageName].src = offimages[num[1]].src;
	setTimeout( "document['" + imageName + "'].src = offimages['" + num[1] + "'].src", 1 );
}

function activate (namelist) {
	// pass comma separated list of image names - first is ON, all the rest are OFF
	var names = namelist.split( ',' );
	imgOn( names[0] );
	for (var i=1; i<names.length; i++) {
		imgOff( names[i] );
	}
}
function loadnew(targ,file){
	if(!document.all && document.getElementById){
	document.getElementById(targ).contentDocument.location.replace(file);
	}else{
	var loadObj = eval(targ);
	loadObj.location.replace(file);
	}
}