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

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, '_ov'+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('_ov'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

//	window.onload = initRollovers;
try{
	window.addEventListener("load",initRollovers,false);
}catch(e){
	window.attachEvent("onload",initRollovers);
}



// Back To Top
function backToTop() {
    var x1 = x2 = x3 = 0;
    var y1 = y2 = y3 = 0;

    if (document.documentElement) {
        x1 = document.documentElement.scrollLeft || 0;
        y1 = document.documentElement.scrollTop || 0;
    }

    if (document.body) {
        x2 = document.body.scrollLeft || 0;
        y2 = document.body.scrollTop || 0;
    }

    x3 = window.scrollX || 0;
    y3 = window.scrollY || 0;

    var x = Math.max(x1, Math.max(x2, x3));
    var y = Math.max(y1, Math.max(y2, y3));

    window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));

    if (x > 0 || y > 0) {
        window.setTimeout("backToTop()", 25);
    }
}



//Right-Clicking Prohibition
	var Mac   = navigator.userAgent.indexOf("Mac") != -1   ? true : false;
	function mdown(e) {
	  if (navigator.appName == "Microsoft Internet Explorer") {
	    if (event.button == 2 || (Mac && (event.ctrlKey || event.keyCode == 91))) {
	      alert("コンテクストメニューは利用できません。\n(c) Christmas on Ice 2008 実行委員会 All rights reserved.");
	      return(false);
	    }
	  } else if (navigator.appName == "Netscape") {
	    if (e.which == 3 || e.modifiers == 2 || e.ctrlKey || e.which == 85) {
			alert("コンテクストメニューは利用できません。\n(c) Christmas on Ice 2008 実行委員会 All rights reserved.");
			return false;
	    }
	  } 
	}
	function noright(){
		alert("コンテクストメニューは利用できません。\n(c) Christmas on Ice 2008 実行委員会 All rights reserved.");
		return false;
	}


	document.oncontextmenu = noright;

	if (document.all && (Mac || ! document.getElementById)) {
		document.onmousedown = mdown;
		document.onkeydown = mdown;
	} else if (document.layers) {
		window.captureEvents(Event.MOUSEDOWN | Event.modifiers | Event.KEYDOWN);
		window.onmousedown = mdown;
		window.onkeydown = mdown;
	} else if(navigator.userAgent.indexOf("Netscape6")!=-1){
		document.onmouseup = mdown;
		document.onkeydown = mdown;
	}