if (document.images) {
 image1on = new Image();
 image1on.src = "../images/plastics_on_02.gif";
 image2on = new Image();
 image2on.src = "../images/plastics_on_04.gif";
 image3on = new Image();
 image3on.src = "../images/plastics_on_05.gif";
 image4on = new Image();
 image4on.src = "../images/plastics_on_14.gif";
 image5on = new Image();
 image5on.src = "../images/plastics_on_10.gif";
 image6on = new Image();
 image6on.src = "../images/plastics_on_07.gif";
 image7on = new Image();
 image7on.src = "../images/plastics_on_08.gif";
 image8on = new Image();
 image8on.src = "../images/plastics_on_09.gif";
 image9on = new Image();
 image9on.src = "../images/plastics_on_16.gif";
 image10on = new Image();
 image10on.src = "../images/plastics_on_11.gif";
 image11on = new Image();
 image11on.src = "../images/plastics_on_12.gif";

 image1off = new Image();
 image1off.src = "../images/plastics_02.gif";
 image2off = new Image();
 image2off.src = "../images/plastics_04.gif";
 image3off = new Image();
 image3off.src = "../images/plastics_05.gif";
 image4off = new Image();
 image4off.src = "../images/plastics_14.gif";
 image5off = new Image();
 image5off.src = "../images/plastics_10.gif";
 image6off = new Image();
 image6off.src = "../images/plastics_07.gif";
 image7off = new Image();
 image7off.src = "../images/plastics_08.gif";
 image8off = new Image();
 image8off.src = "../images/plastics_09.gif";
 image9off = new Image();
 image9off.src = "../images/plastics_16.gif";
 image10off = new Image();
 image10off.src = "../images/plastics_11.gif";
 image11off = new Image();
 image11off.src = "../images/plastics_12.gif";
}

function changeImages() {
 if (document.images) {
 for (var i=0; i<changeImages.arguments.length; i+=2) {
 document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
 }
 }
}