// ROLLOVER EVENT

function initRollovers() {
if (!document.getElementById) return

var aPreLoad = new Array();
var sTempSrc;
var aImages = document.getElementsByTagName('img');

for (var i = 0; i < aImages.length; i++) {
if (aImages[i].className == 'imgover') {
var src = aImages[i].getAttribute('src');
var ftype = src.substring(src.lastIndexOf('.'), src.length);
var hsrc = src.replace(ftype, '_on'+ftype);

aImages[i].setAttribute('hsrc', hsrc);

aPreLoad[i] = new Image();
aPreLoad[i].src = hsrc;

aImages[i].onmouseover = function() {
sTempSrc = this.getAttribute('src');
this.setAttribute('src', this.getAttribute('hsrc'));
}

aImages[i].onmouseout = function() {
if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
this.setAttribute('src', sTempSrc);
}
}
}
}

window.onload = initRollovers;

/*
Standards Compliant Rollover Script
Author : Daniel Nolan
http://www.bleedingego.co.uk/webdev.php
*/


function openCenter(url, name, width, height) {
var style = "menubar=yes,toolbar=yes,location=yes,status=yes,scrollbars=yes,resizable=yes";
style += ",width=" + width + ",left=" + (screen.availWidth - width) / 2;
style += ",height=" + height + ",top=" + (screen.availHeight - height) / 2;
open(url, name, style);
return false;
}

// ALERT EVENT
function showalert() {
window.alert("ログインできません。");
}