if (document.images) { 


var top_navi1on = new Image();
top_navi1on.src = "http://www.shinrakan.com/custom/img/navi-btn01_off.jpg";
var top_navi1off = new Image();
top_navi1off.src = "http://www.shinrakan.com/custom/img/navi-btn01_on.jpg";

var top_navi2on = new Image();
top_navi2on.src = "http://www.shinrakan.com/custom/img/navi-btn02_off.jpg";
var top_navi2off = new Image();
top_navi2off.src = "http://www.shinrakan.com/custom/img/navi-btn02_on.jpg";

var top_navi3on = new Image();
top_navi3on.src = "http://www.shinrakan.com/custom/img/navi-btn03_off.jpg";
var top_navi3off = new Image();
top_navi3off.src = "http://www.shinrakan.com/custom/img/navi-btn03_on.jpg";

var top_navi4on = new Image();
top_navi4on.src = "http://www.shinrakan.com/custom/img/navi-btn04_off.jpg";
var top_navi4off = new Image();
top_navi4off.src = "http://www.shinrakan.com/custom/img/navi-btn04_on.jpg";

var top_navi5on = new Image();
top_navi5on.src = "http://www.shinrakan.com/custom/img/navi-btn05_off.jpg";
var top_navi5off = new Image();
top_navi5off.src = "http://www.shinrakan.com/custom/img/navi-btn05_on.jpg";

}



// ポイント時の処理 
function On(name) { 
if (document.images) { 
document.images[name].src = eval(name + 'on.src'); 
} 
} 

// 放した時の処理 
function Off(name) { 
if (document.images) { 
document.images[name].src = eval(name + 'off.src'); 
} 
}