if (document.images) {

                                  img01on=new Image();
                                  img01on.src="images/menu/map1.gif";

                                  img02on=new Image();
                                  img02on.src="images/menu/catalog1.gif";

                                  img03on=new Image();
                                  img03on.src="images/menu/enq1.gif";

                                  img04on=new Image();
                                  img04on.src="images/menu/how1.gif";

                                  img05on=new Image();
                                  img05on.src="images/menu/link1.gif";

                                  img06on=new Image();
                                  img06on.src="images/menu/01a.gif";

                                  img07on=new Image();
                                  img07on.src="images/menu/02a.gif";

                                  img08on=new Image();
                                  img08on.src="images/menu/03a.gif";

                                  img09on=new Image();
                                  img09on.src="images/menu/04a.gif";

                                  img10on=new Image();
                                  img10on.src="images/menu/05a.gif";

                                  img11on=new Image();
                                  img11on.src="images/menu/06a.gif";

                                  img12on=new Image();
                                  img12on.src="images/menu/07a.gif";

                                  img13on=new Image();
                                  img13on.src="images/menu/08a.gif";

                                  img14on=new Image();
                                  img14on.src="images/menu/09a.gif";

                                  img15on=new Image();
                                  img15on.src="images/menu/10a.gif";

                                  img16on=new Image();
                                  img16on.src="images/menu/11a.gif";

                                  img17on=new Image();
                                  img17on.src="images/menu/12a.gif";

                                  img18on=new Image();
                                  img18on.src="images/menu/13a.gif";

                                  img19on=new Image();
                                  img19on.src="images/menu/14a.gif";

                                  img20on=new Image();
                                  img20on.src="images/menu/info1.gif";

                                  img21on=new Image();
                                  img21on.src="images/menu/gallery1.gif";

                                  img22on=new Image();
                                  img22on.src="images/menu/15a.gif";

                                  img23on=new Image();
                                  img23on.src="images/menu/16a.gif";

                                  img24on=new Image();
                                  img24on.src="images/menu/17a.gif";

                                  img25on=new Image();
                                  img25on.src="images/menu/18a.gif";

                                  img26on=new Image();
                                  img26on.src="images/menu/19a.gif";

                                  img27on=new Image();
                                  img27on.src="images/menu/school1.gif";


                                  img01off=new Image();
                                  img01off.src="images/menu/map2.gif";

                                  img02off=new Image();
                                  img02off.src="images/menu/catalog2.gif";

                                  img03off=new Image();
                                  img03off.src="images/menu/enq2.gif";

                                  img04off=new Image();
                                  img04off.src="images/menu/how2.gif";

                                  img05off=new Image();
                                  img05off.src="images/menu/link2.gif";

                                  img06off=new Image();
                                  img06off.src="images/menu/01b.gif";

                                  img07off=new Image();
                                  img07off.src="images/menu/02b.gif";

                                  img08off=new Image();
                                  img08off.src="images/menu/03b.gif";

                                  img09off=new Image();
                                  img09off.src="images/menu/04b.gif";

                                  img10off=new Image();
                                  img10off.src="images/menu/05b.gif";

                                  img11off=new Image();
                                  img11off.src="images/menu/06b.gif";

                                  img12off=new Image();
                                  img12off.src="images/menu/07b.gif";

                                  img13off=new Image();
                                  img13off.src="images/menu/08b.gif";

                                  img14off=new Image();
                                  img14off.src="images/menu/09b.gif";

                                  img15off=new Image();
                                  img15off.src="images/menu/10b.gif";

                                  img16off=new Image();
                                  img16off.src="images/menu/11b.gif";

                                  img17off=new Image();
                                  img17off.src="images/menu/12b.gif";

                                  img18off=new Image();
                                  img18off.src="images/menu/13b.gif";

                                  img19off=new Image();
                                  img19off.src="images/menu/14b.gif";

                                  img20off=new Image();
                                  img20off.src="images/menu/info2.gif";

                                  img21off=new Image();
                                  img21off.src="images/menu/gallery2.gif";

                                  img22off=new Image();
                                  img22off.src="images/menu/15b.gif";

                                  img23off=new Image();
                                  img23off.src="images/menu/16b.gif";

                                  img24off=new Image();
                                  img24off.src="images/menu/17b.gif";

                                  img25off=new Image();
                                  img25off.src="images/menu/18b.gif";

                                  img26off=new Image();
                                  img26off.src="images/menu/19b.gif";

                                  img27off=new Image();
                                  img27off.src="images/menu/school2.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");
                                 }
}