IE6下JS动态设置图片src地址的问题

<script language="javascript">
function picclick()
{
var pic = $('marqueediv').getElementsByTagName('a');
var len = pic.length;
for(var i = 0; i < len; i ++ )
{
pic[i].onclick = function(i)
{
return function()
{
for(var t = 0; t < len; t ++ )
{
pic[t].className = t == i ? 'hover' : '';
this.className = 'hover'
}
var thispic;
sspic = pic[i].childNodes[0].src;
thispic = 'uploadimg/' + sspic.substring(sspic.indexOf('uploadimg/s'), sspic.length).replace('uploadimg/s', '');
$('pro_pic_item').setAttribute('src', thispic);
$('pro_pic_item').setAttribute('alt', 'images');
//解决方法：在此处加上“return false;”
return false;
}
}
(i)
}
}
</script>