(function(onLoad) {

    try {

        window.addEventListener('load', onLoad, false);

    } catch (e) {

        window.attachEvent('onload', onLoad);

    }

})(function() {

  var tags = ["img","input"];

  for( var i=0, len=tags.length; i<len; i++ ) {

    var over = function() { this.src = this.src.replace('_off.', '_on.'); };

    var out  = function() { this.src = this.src.replace('_on.', '_off.'); };

    var el = document.getElementsByTagName(tags[i]);

    for (var j=0, len2=el.length; j<len2; j++) {

      var attr = el[j].getAttribute('src');

      if (!el[j].src.match(/_off\./)&&attr) continue;

      el[j].onmouseover = over;

      el[j].onmouseout  = out;

    }

  }

});



function change_bgi(id,img_src){

document.all[id].style.backgroundImage = "url(" + img_src + ")"

}