DHTML Object Moving

[elfanddot]

i found a bit of code on the web, yet it is declairing error on page. i've isolated the code to
document.all.image1.style.pixelLeft=400;
image1 is image1 (the image/object name) because of a previouse document.images[1].name="image1";

the actuall code appears as
...
if(document.layers)
{...}
else if (document.all)
{
eval('document.all.'+image.named+'.style.pixelLeft='+image.xx);
...
}
else if (document.getElementById)
{...}
...

do any of you know what is wrong with this picture? if it can't be done, someone is trying