if(navigator.appVersion.charAt(0)>=3){
var imgAry=new Array();

for(i=0;i<20;i++){
imgAry[i]=new Image();
}

imgAry[0].src="./images/hnavi_home.gif";
imgAry[1].src="./images/hnavi_home_on.gif";
imgAry[2].src="./images/hnavi_denki.gif";
imgAry[3].src="./images/hnavi_denki_on.gif";
imgAry[4].src="./images/hnavi_kucho.gif";
imgAry[5].src="./images/hnavi_kucho_on.gif";
imgAry[6].src="./images/hnavi_company.gif";
imgAry[7].src="./images/hnavi_company_on.gif";
imgAry[8].src="./images/hnavi_recruit.gif";
imgAry[9].src="./images/hnavi_recruit_on.gif";
imgAry[10].src="./images/hnavi_maker.gif";
imgAry[11].src="./images/hnavi_maker_on.gif";
imgAry[12].src="./images/hnavi_contact.gif";
imgAry[13].src="./images/hnavi_contact_on.gif";
imgAry[14].src="./images/top_denki.gif";
imgAry[15].src="./images/top_denki_on.gif";
imgAry[16].src="./images/top_kucho.gif";
imgAry[17].src="./images/top_kucho_on.gif";
imgAry[18].src="./images/top_company.gif";
imgAry[19].src="./images/top_company_on.gif";
}

function changeImg(dim,cnt){
if(navigator.appVersion.charAt(0)>=3){
document.images[dim].src=imgAry[cnt].src;
};
};