var entrance = '';
var imga = new Array(3);
var imgb = new Array(3);
var id = '';
var flg = 0;
var appVer = parseInt(navigator.appVersion);
var isNC = (document.layers && (appVer >= 3));
var isIE = (document.all && (appVer >= 4));
var isW3C = (document.getElementById);
if (isNC || isIE || isW3C) entrance = 'yes';
if (entrance=='yes'){
	imga[1] = new Image(); imga[1].src = "http://www.hotate.net/common/images/top_03a.gif";
	imgb[1] = new Image(); imgb[1].src = "http://www.hotate.net/common/images/top_03b.gif";
	imga[2] = new Image(); imga[2].src = "http://www.hotate.net/common/images/top_04a.gif";
	imgb[2] = new Image(); imgb[2].src = "http://www.hotate.net/common/images/top_04b.gif";
	imga[3] = new Image(); imga[3].src = "http://www.hotate.net/common/images/top_05a.gif";
	imgb[3] = new Image(); imgb[3].src = "http://www.hotate.net/common/images/top_05b.gif";
} else {
	imga[1] = new Image(); imga[1].src = "";
	imgb[1] = new Image(); imgb[1].src = "";
	imga[2] = new Image(); imga[2].src = "";
	imgb[2] = new Image(); imgb[2].src = "";
	imga[3] = new Image(); imga[3].src = "";
	imgb[3] = new Image(); imgb[3].src = "";
}
function img_over(id){
if(entrance == 'yes'){
document.images["img"+id].src = eval("imgb["+id+"].src");
 }
}
function img_out(id){
if(entrance == 'yes'){
if(flg != id){
document.images["img"+id].src = eval("imga["+id+"].src");
  }
 }
}
function img_click(id){
if( entrance == 'yes'){
if(flg){
document.images["img"+flg].src = eval("imga["+flg+"].src");
}
document.images["img"+id].src = eval("imgb["+id+"].src");
flg = id;
 }
}