function imgLoad(obj, maxwid)
{
    var img, wid, j;
    if(!maxwid)maxwid = 640;
    for(j = 0; j < 100; j++){
        img         = new Image;
        img.src     = obj.src;
        wid         = img.width;
        if(wid > 0)break;
    }
    if(wid > maxwid){
        wid         = maxwid;
    }
    if(wid){
        obj.width   = wid;
    }
}