//--------ブラウザ情報の初期化---------
NN3 = NC4 = IE4 = IE5 = 0;
if (( navigator.appName.charAt(0) == "N" ) && ( navigator.appVersion.charAt(0) >= "4" )) {
	NN3 = NC4 = "True";
}
if (( navigator.appName.charAt(0) == "M" ) && ( navigator.appVersion.charAt(0) >= "4" )) {
	IE4 = IE5 = "True";
}


//--------画像のswap関数---------
function mOver(num){
	if ((NN3 || NC4 || IE4 || IE5)) {
			document.images["btn0" + num].src = "btn" + num + "_on.gif";
	}
}
function mOut(num){
	if ((NN3 == NC4 || IE4 || IE5)) {
		document.images["btn0" + num].src = "btn" + num + "_off.gif";
	}
}
function ch1(p1,p2){
	parent.wleft.location.href=p1
	parent.wright.location.href=p2
}

<!--Begin preLoad
var preloadList = new Array(
	"btn0_off.gif",
	"btn1_off.gif",
	"btn2_off.gif",
	"btn3_off.gif",
	"btn4_off.gif",
	"btn5_off.gif",
	"btn6_off.gif",
	"btn7_off.gif",

	"btn0_on.gif",
	"btn1_on.gif",
	"btn2_on.gif",
	"btn3_on.gif",
	"btn4_on.gif",
	"btn5_on.gif",
	"btn6_on.gif",
	"btn7_on.gif"
);
var cashImages = new Array();
for(field in preloadList) {
	cashImages[field] = new Image();
	cashImages[field].src = preloadList[field];
}