//
// ブラウザ and バージョンチェック
//
var ver4 = (navigator.appVersion.charAt(0) >= "4");
var NN4  = ver4 && (navigator.appName == "Netscape");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NN3 = ((navigator.appVersion.charAt(0) == "3") && (navigator.appName == "Netscape"));
if(NN3 || NN4 || IE4){
        var imgM = new Array();
        imgM[0] = new Image();  imgM[0].src = "images/grbox_on.gif";
        imgM[1] = new Image();  imgM[1].src = "images/grbox.gif";
		imgM[2] = new Image();  imgM[2].src = "images/visual_grbox_on.gif";
        imgM[3] = new Image();  imgM[3].src = "images/visual_grbox.gif";
		imgM[4] = new Image();  imgM[4].src = "images/kotoba_grbox_on.gif";
        imgM[5] = new Image();  imgM[5].src = "images/kotoba_grbox.gif";
}

function Min(nam,num) {
        if(NN3 || NN4 || IE4) document.images[nam].src = imgM[num].src;
}

function Mout(nam,num) {
        if(NN3 || NN4 || IE4) document.images[nam].src = imgM[num].src;
}