function init() {
	/* rollover */
	var imgs = document.getElementsByTagName('img');
	var preloadimgs = new Array();
	var filetype = new Array();
	
	for(i=0;i<imgs.length;i++) {
		if(imgs[i].className == 'rollover') {
			var src = imgs[i].getAttribute('src');
			var filetype = src.substring(src.lastIndexOf('.'), src.length);
			var oversrc = src.replace(filetype, 'o'+filetype);
			
			preloadimgs[i] = new Image();
			preloadimgs[i].src = oversrc;
			
			imgs[i].onmouseover = function() {
				var filetype = this.getAttribute('src').substring(this.getAttribute('src').lastIndexOf('.'), this.getAttribute('src').length);
				this.setAttribute('src', this.getAttribute('src').replace(filetype, 'o'+filetype));
			}
			imgs[i].onmouseout = function() {
				var filetype = this.getAttribute('src').substring(this.getAttribute('src').lastIndexOf('.'), this.getAttribute('src').length);
				this.setAttribute('src', this.getAttribute('src').replace('o'+filetype, filetype));
			}
			imgs[i].onclick = function() {
				var filetype = this.getAttribute('src').substring(this.getAttribute('src').lastIndexOf('.'), this.getAttribute('src').length);
				this.setAttribute('src', this.getAttribute('src').replace('o'+filetype, filetype));
			}
		}
	}
	/* rollover */
}

window.onload = init;

function enterindex(){
	document.getElementById('flashcontent').style.display='none';
	document.getElementById('body').style.display='block';
	document.getElementsByTagName('body').item(0).style.background='url(img/bg-index.jpg) no-repeat';
	setCookie(100);
}
function setCookie(limitday){
	expireday = new Date();
	expireday.setTime(expireday.getTime() + (limitday * 1000 * 60 * 60 * 24));
	expireday = expireday.toGMTString();
	document.cookie = "introflag=off;expires="+expireday+";path=/";
}

function showLayer(layerid){
	document.getElementById(layerid).style.display='block';
}
function hideLayer(layerid){
	document.getElementById(layerid).style.display='none';
}
function changeLayer(id){
if(document.getElementById){
	layerStatus=document.getElementById(id).style.display;
	if(layerStatus=='none'){
		showLayer(id);
	}else{
		hideLayer(id);
	}
}
}