var curImgId;

for(var i=0; i<rolls.length; i++){
	eval ("var "+rolls[i] +" = new Image();");
	eval (rolls[i]+".src= '"+basedir+"images/"+ rolls[i]+".gif'");
	eval ("var "+rolls[i] + "_over = new Image();");
	eval (rolls[i]+"_over.src = '"+basedir+"images/"+ rolls[i]+"_on.gif'");
}

function over(imgId){
	curImgId = imgId;
	document.images[imgId].src = eval(imgId+"_over.src");
}

function out(imgId){
	document.images[imgId].src = eval(imgId+".src");
}