document.observe("dom:loaded", function() {
    
    Event.observe($("AWrapper"), 'mouseover', function() {
        this.setStyle({backgroundImage:'url(images/bg_01_ho.png)'});
    })
    Event.observe($("AWrapper"), 'mouseout', function() {
        this.setStyle({backgroundImage:'url(images/bg_01.png)'});
    })
    
    
    Event.observe($("BWrapper"), 'mouseover', function() {
        this.setStyle({backgroundImage:'url(images/bg_02_ho.png)'});
    })
    Event.observe($("BWrapper"), 'mouseout', function() {
        this.setStyle({backgroundImage:'url(images/bg_02.png)'});
    })
    
    
    Event.observe($("CWrapper"), 'mouseover', function() {
        this.setStyle({backgroundImage:'url(images/bg_03_ho.png)'});
    })
    Event.observe($("CWrapper"), 'mouseout', function() {
        this.setStyle({backgroundImage:'url(images/bg_03.png)'});
    })
    
    
   /* Event.observe($("EWrapper"), 'mouseover', function() {
        this.setStyle({backgroundImage:'url(images/bg_05_ho.png)'});
    })
    Event.observe($("EWrapper"), 'mouseout', function() {
        this.setStyle({backgroundImage:'url(images/bg_05.png)'});
    })
    */
    
    Event.observe($("DWrapper"), 'mouseover', function() {
        this.setStyle({backgroundImage:'url(images/bg_04_ho.png)'});
    })
    Event.observe($("DWrapper"), 'mouseout', function() {
        this.setStyle({backgroundImage:'url(images/bg_04.png)'});
    })
 })