//トップページボタン 
var img_corp = new Array()

img_corp[1]=new Image();img_corp[1].src="/corp/img/img_btn_corptop_01_over.gif";
img_corp[2]=new Image();img_corp[2].src="/corp/img/img_btn_corptop_02_over.gif";
img_corp[3]=new Image();img_corp[3].src="/corp/img/img_btn_corptop_03_over.gif";
img_corp[4]=new Image();img_corp[4].src="/corp/img/img_btn_corptop_04_over.gif";

function corpOn(n){
 y="corp_0"+n;
 document.images[y].src=eval("img_corp["+n+"].src");
}
function corpOut(n){
 y="corp_0"+n;
 document.images[y].src="/corp/img/img_btn_corptop_0"+n+".gif";
}