color01on=new Image();
color01on.src="images/color01.jpg";
color02on=new Image();
color02on.src="images/color02.jpg";
color03on=new Image();
color03on.src="images/color03.jpg";
color04on=new Image();
color04on.src="images/color04.jpg";
color05on=new Image();
color05on.src="images/color05.jpg";
color06on=new Image();
color06on.src="images/color06.jpg";
color07on=new Image();
color07on.src="images/color07.jpg";
color08on=new Image();
color08on.src="images/color08.jpg";

function onImg(imgName,imgNum){
document[imgNum].src=eval(imgName+"on.src");
}