if(navigator.appVersion.charAt(0) >= '3'){
image = new Array();
// ボタン【HOME】
image[0] = new Image;
image[0].src = 'shared/images/bu_home1.gif';
image[1] = new Image;
image[1].src = 'shared/images/bu_home2.gif';
// ボタン【CONTACT】
image[2] = new Image;
image[2].src = 'shared/images/bu_contact1.gif';
image[3] = new Image;
image[3].src = 'shared/images/bu_contact2.gif';
// ボタン【UNDERHOME】
image[4] = new Image;
image[4].src = '../shared/images/bu_home1.gif';
image[5] = new Image;
image[5].src = '../shared/images/bu_home2.gif';
// ボタン【UNDERCONTACT】
image[6] = new Image;
image[6].src = '../shared/images/bu_contact1.gif';
image[7] = new Image;
image[7].src = '../shared/images/bu_contact2.gif';
}

function home(a){
if(navigator.appVersion.charAt(0) >= '3'){
document.images['image1'].src=image[a].src;
}
}

function contact(a){
if(navigator.appVersion.charAt(0) >= '3'){
document.images['image2'].src=image[a].src;
}
}

function underhome(a){
if(navigator.appVersion.charAt(0) >= '3'){
document.images['image3'].src=image[a].src;
}
}

function undercontact(a){
if(navigator.appVersion.charAt(0) >= '3'){
document.images['image4'].src=image[a].src;
}
}