if (document.images) {

                                  img01on=new Image();
                                  img01on.src="images/menu/home02.gif";

                                  img02on=new Image();
                                  img02on.src="images/menu/profile02.gif";

                                  img03on=new Image();
                                  img03on.src="images/menu/news02.gif";

                                  img04on=new Image();
                                  img04on.src="images/menu/mail02.gif";

                                  img05on=new Image();
                                  img05on.src="images/menu/restore02.gif";

                                  img06on=new Image();
                                  img06on.src="images/menu/past02.gif";

                                  img07on=new Image();
                                  img07on.src="images/menu/works-eye02.gif";

                                  img08on=new Image();
                                  img08on.src="images/menu/works01-02.gif";

                                  img09on=new Image();
                                  img09on.src="images/menu/works02-02.gif";

                                  img10on=new Image();
                                  img10on.src="images/menu/works03-02.gif";

                                  img11on=new Image();
                                  img11on.src="images/menu/works-sweets02.gif";

                                  img12on=new Image();
                                  img12on.src="images/menu/link02.gif";

                                  img13on=new Image();
                                  img13on.src="images/menu/strap02.gif";

                                  img14on=new Image();
                                  img14on.src="images/menu/works04-02.gif";


                                  img01off=new Image();
                                  img01off.src="images/menu/home01.gif";

                                  img02off=new Image();
                                  img02off.src="images/menu/profile01.gif";

                                  img03off=new Image();
                                  img03off.src="images/menu/news01.gif";

                                  img04off=new Image();
                                  img04off.src="images/menu/mail01.gif";

                                  img05off=new Image();
                                  img05off.src="images/menu/restore01.gif";

                                  img06off=new Image();
                                  img06off.src="images/menu/past01.gif";

                                  img07off=new Image();
                                  img07off.src="images/menu/works-eye01.gif";

                                  img08off=new Image();
                                  img08off.src="images/menu/works01-01.gif";

                                  img09off=new Image();
                                  img09off.src="images/menu/works02-01.gif";

                                  img10off=new Image();
                                  img10off.src="images/menu/works03-01.gif";

                                  img11off=new Image();
                                  img11off.src="images/menu/works-sweets01.gif";

                                  img12off=new Image();
                                  img12off.src="images/menu/link01.gif";

                                  img13off=new Image();
                                  img13off.src="images/menu/strap01.gif";

                                  img14off=new Image();
                                  img14off.src="images/menu/works04-01.gif";



                                  }
function imgOn(imgName) { 
              if (document.images) {
                    document[imgName].src=eval(imgName+"on.src");
                                 }
}
function imgOff(imgName) {
               if (document.images) {
                    document[imgName].src=eval(imgName+"off.src");
                                 }
}