if (document.images) {       
            img31up = new Image();      
            img31up.src = "img/b_kappa.gif"; 
            img32up = new Image();      
            img32up.src = "img/b_murasakiayaka.gif"; 
            img33up = new Image();      
            img33up.src = "img/b_toyaharaumi.gif"; 
            img34up = new Image();      
            img34up.src = "img/b_toua.gif"; 
            img35up = new Image();      
            img35up.src = "img/b_nekokei.gif"; 
            img36up = new Image();      
            img36up.src = "img/b_inuwarabi.gif"; 

            img31dn = new Image();      
            img31dn.src = "img/b_kappa2.gif"; 
            img32dn = new Image();      
            img32dn.src = "img/b_murasakiayaka2.gif"; 
            img33dn = new Image();      
            img33dn.src = "img/b_toyaharaumi2.gif"; 
            img34dn = new Image();      
            img34dn.src = "img/b_toua2.gif"; 
            img35dn = new Image();      
            img35dn.src = "img/b_nekokei2.gif"; 
            img36dn = new Image();      
            img36dn.src = "img/b_inuwarabi2.gif"; 
        }



// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "dn.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "up.src");
        }
}

function aoki01MouseOver(){
        imgOn('img31');
}

function aoki01MouseOut(){
        imgOff('img31');
}

function aoki02MouseOver(){
        imgOn('img32');
}

function aoki02MouseOut(){
        imgOff('img32');
}

function aoki03MouseOver(){
        imgOn('img33');
}

function aoki03MouseOut(){
        imgOff('img33');
}

function aoki04MouseOver(){
        imgOn('img34');
}

function aoki04MouseOut(){
        imgOff('img34');
}

function aoki05MouseOver(){
        imgOn('img35');
}

function aoki05MouseOut(){
        imgOff('img35');
}

function aoki06MouseOver(){
        imgOn('img36');
}

function aoki06MouseOut(){
        imgOff('img36');
}