topmenuImg = new Array();
topmenuImg[0] = "/common/img/btn_top.gif";
topmenuImg[1] = "/common/img/btn_company.gif";
topmenuImg[2] = "/common/img/btn_service.gif";
topmenuImg[3] = "/common/img/btn_recruit.gif";
topmenuImg[4] = "/common/img/btn_contact.gif";
topmenuImg[5] = "/common/img/btn_unknown.gif";
topmenuImg[6] = "/common/img/btn_top_on.gif";
topmenuImg[7] = "/common/img/btn_company_on.gif";
topmenuImg[8] = "/common/img/btn_service_on.gif";
topmenuImg[9] = "/common/img/btn_recruit_on.gif";
topmenuImg[10] = "/common/img/btn_contact_on.gif";
topmenuImg[11] = "/common/img/btn_unknown_on.gif";

topmenuPre = new Array();
for(i=0;i<topmenuImg.length;i++){
	topmenuPre[i] = new Image();
	topmenuPre[i].src = topmenuImg[i];
}
function changeImage(IdName,n){
	document.getElementById(IdName).src=topmenuImg[n];
}
function returnImage(IdName,n){
	document.getElementById(IdName).src=topmenuImg[n];
}