// copied from http://archiva.jp/web/javascript/get_page-size.html
// Thanks!!!

function getScreenSize() {
var obj = new Object();
if (!isSafari && !isOpera) {
obj.x = document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth;
obj.y = document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight;
} else {
obj.x = window.innerWidth;
obj.y = window.innerHeight;
}
obj.mx = parseInt((obj.x)/2);
obj.my = parseInt((obj.y)/2);
return obj;
}

var isWin9X = (navigator.appVersion.toLowerCase().indexOf('windows 98')+1);
var isIE = (navigator.appName.toLowerCase().indexOf('internet explorer')+1?1:0);
var isOpera = (navigator.userAgent.toLowerCase().indexOf('opera')+1?1:0);
if (isOpera) isIE = false;
var isSafari = (navigator.appVersion.toLowerCase().indexOf('safari')+1?1:0);