if (document.images) { 

var img1on = new Image();
img1on.src = "images/btn_company_on.gif"; 
var img1off = new Image();
img1off.src = "images/btn_company.gif";

var img2on = new Image();
img2on.src = "images/btn_appli_on.gif"; 
var img2off = new Image();
img2off.src = "images/btn_appli.gif";

var img3on = new Image();
img3on.src = "images/btn_job_on.gif"; 
var img3off = new Image();
img3off.src = "images/btn_job.gif";

var img4on = new Image();
img4on.src = "images/btn_flow_on.gif"; 
var img4off = new Image();
img4off.src = "images/btn_flow.gif";

var img5on = new Image();
img5on.src = "images/btn_privacy_on.gif"; 
var img5off = new Image();
img5off.src = "images/btn_privacy.gif";

var img6on = new Image();
img6on.src = "images/navi_list_on.gif"; 
var img6off = new Image();
img6off.src = "images/navi_list.gif";

var img7on = new Image();
img7on.src = "images/navi_kawashinHP_on.gif"; 
var img7off = new Image();
img7off.src = "images/navi_kawashinHP.gif";

} 


function On(name) { 

if (document.images) { 
document.images[name].src = eval(name + 'on.src'); 
} 

} 


function Off(name) { 

if (document.images) { 
document.images[name].src = eval(name + 'off.src'); 
} 

}