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

for(i=0;i<18;i++){
imgAry[i]=new Image();
}

imgAry[0].src="./images/top_navi_greeting.gif";
imgAry[1].src="./images/top_navi_greeting_on.gif";
imgAry[2].src="./images/top_navi_information.gif";
imgAry[3].src="./images/top_navi_information_on.gif";
imgAry[4].src="./images/top_navi_kannai.gif";
imgAry[5].src="./images/top_navi_kannai_on.gif";
imgAry[6].src="./images/top_navi_equipment.gif";
imgAry[7].src="./images/top_navi_equipment_on.gif";
imgAry[8].src="./images/top_navi_access.gif";
imgAry[9].src="./images/top_navi_access_on.gif";
imgAry[10].src="./images/top_navi_link.gif";
imgAry[11].src="./images/top_navi_link_on.gif";
imgAry[12].src="./images/top_navi_contact.gif";
imgAry[13].src="./images/top_navi_contact_on.gif";
imgAry[14].src="./images/top_navi_column.gif";
imgAry[15].src="./images/top_navi_column_on.gif";
imgAry[16].src="./images/top_navi_health.gif";
imgAry[17].src="./images/top_navi_health_on.gif";
}

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