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var img1on = new Image();
img1on.src = "/image/globalhome-on.gif";
var img1off = new Image();
img1off.src = "/image/globalhome.gif";

var img2on = new Image();
img2on.src = "/image/globalabout-on.gif";
var img2off = new Image();
img2off.src = "/image/globalabout.gif";

var img3on = new Image();
img3on.src = "/image/globalintro-on.gif";
var img3off = new Image();
img3off.src = "/image/globalintro.gif";

var img4on = new Image();
img4on.src = "/image/globalsolution-on.gif";
var img4off = new Image();
img4off.src = "/image/globalsolution.gif";

var img5on = new Image();
img5on.src = "/image/globalhow-on.gif";
var img5off = new Image();
img5off.src = "/image/globalhow.gif";

}

function on(id) { if (document.images) { document.images[id].src = eval(id + 'on.src'); } }
function off(id) { if (document.images) { document.images[id].src = eval(id + 'off.src'); } }