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;


now = new Date();
ima = now.getHours();

if ((ima >= 5) && (ima < 7)) {
document.write("<head><LINK rel='stylesheet' TYPE='text/css' href='common/css/asa.css'></head>");
}
else if ((ima >= 7) && (ima < 17)) {
document.write("<head><LINK rel='stylesheet' TYPE='text/css' href='common/css/hiru.css'></head>");
}
else if ((ima >= 17) && (ima < 19)) {
document.write("<head><LINK rel='stylesheet' TYPE='text/css' href='common/css/yuu.css'></head>");
}
else {
document.write("<head><LINK rel='stylesheet' TYPE='text/css' href='common/css/yoru.css'></head>");
}