var aimg = new Array();
aimg[1] = new Image(); aimg[1].src = 'img/bg_5.gif'; //menu up line off
aimg[2] = new Image(); aimg[2].src = 'img/bg_4.gif'; //menu up line on

function change (imgname,imgobj){
//alert (imgobj.src);
//alert (imgname.src);
imgname.src = imgobj.src;
};