/*====================================================================================================
//////////////////////////////////////////////////////////////////////////////////////////////////////

Author : http://www.yomotsu.net
created: 2007/03/13
update : 2008/01/21
Licensed under the GNU Lesser General Public License version 2.1

//////////////////////////////////////////////////////////////////////////////////////////////////////
====================================================================================================*/
var yomotsuRollover = {
     
     main : function() {
          var img = document.images, ipt = document.getElementsByTagName('input'), i, preLoadImg = [];
          // img elements
          for (i = 0; i <img.length; i++) {
               if ((img[i].src.match(/.*_n\./))||(img[i].style.filter)){
                    preLoadImg[preLoadImg.length] = new Image;
                    preLoadImg[preLoadImg.length-1].src = img[i].src.replace('_n.', '_r.');

                    img[i].onmouseover = yomotsuRollover.over;
                    img[i].onmouseout  = yomotsuRollover.out;
                    try {img[i].addEventListener('click', yomotsuRollover.click, false);}
                    catch(e){img[i].attachEvent('onclick', (function(el){return function(){yomotsuRollover.click.call(el);};})(img[i]));}
               }
          }
          // input[image] elements
          for (i = 0; i <ipt.length; i++) {
               if ((ipt[i].src.match(/.*_n\./))&&(ipt[i].getAttribute('type')=='image')){
                    preLoadImg[preLoadImg.length] = new Image;
                    preLoadImg[preLoadImg.length-1].src = img[i].src.replace('_n.', '_r.');

                    ipt[i].onmouseover = yomotsuRollover.over;
                    ipt[i].onmouseout  = yomotsuRollover.out;
                    try {ipt[i].addEventListener('click', yomotsuRollover.click, false);}
                    catch(e){ipt[i].attachEvent('onclick', (function(el){return function(){yomotsuRollover.click.call(el);};})(ipt[i]));}
               }
          }
     }
     ,
     
     over : function() {
          var imgSrc, preLoadImgSrc;
          if((this.style.filter)&&(this.style.filter.match(/_n\.png/)))//(IE5.5-6 && png)
               this.style.filter = this.style.filter.replace('_n.png', '_r.png');
          else
               this.src = this.src.replace('_n.', '_r.');
     },

     out : function(){
          if((this.style.filter)&&(this.style.filter.match(/_r\.png/)))//(IE5.5-6 && png)
               this.style.filter = this.style.filter.replace('_r.png', '_n.png');
          else
               this.src = this.src.replace('_r.', '_n.');
     },
     
     click : function(){
          if((this.style.filter)&&(this.style.filter.match(/_r\.png/)))//(IE5.5-6 && png)
               this.style.filter = this.style.filter.replace('_r.png', '_n.png');
          else
               this.src = this.src.replace('_r.', '_n.');
     },

     addEvent : function(){
          try {
               window.addEventListener('load', this.main, false);
          } catch (e) {
               window.attachEvent('onload', this.main);
          }
     }
}

yomotsuRollover.addEvent();