/* default variables
============================================================*/
var agent = navigator.userAgent.toLowerCase();
var dname = new String(document.domain);
var path = new String(location.pathname);
var w3c = document.getElementById;




/* client variables
============================================================*/
var win = (agent.indexOf("windows") != -1);
var mac = (agent.indexOf("mac") != -1);
var gecko = agent.indexOf("gecko") != -1;
var opera = agent.indexOf("opera",0) != -1;
var safari = agent.indexOf("safari") != -1;
var ie = agent.indexOf("msie") != -1 && !opera;
var ie6win = (agent.indexOf("msie 6.") != -1) && win;
var ie7win = (agent.indexOf("msie 7.") != -1) && win;
var ie5mac = (agent.indexOf("msie") != -1) && mac;
var ns = agent.indexOf("netscape") != -1 && !opera;
var ns6 = (agent.indexOf("netscape6/6.") != -1) && ns;




/* preload function
============================================================*/
function preLoadImg(){
	if(document.images){
		var loadedImg = new Array();
		var arg = preLoadImg.arguments;
		for(i=0;i<arg.length;i++){
			loadedImg[i] = new Image();
			loadedImg[i].src = arg[i];
		}
	}
}




/* rollover function
============================================================*/
function setRollOver(){
	if(!document.getElementsByTagName) return false;
	var ovrImgList = document.getElementsByTagName("img");
	for(var i=0;i<ovrImgList.length;i++){
		if(ovrImgList[i].className.match("over")){
			preLoadImg(ovrImgList[i].src.replace(/_off./i,"_on."));
			ovrImgList[i].onmouseover = function(){
				this.src = this.src.replace(/_off./i,"_on.");
				return false;
			}
			ovrImgList[i].onmouseout = function(){
				this.src = this.src.replace(/_on./i,"_off.");
				return false;
			}
		}
	}
}




/* popup window function
============================================================*/
function popupWindow(url,name,status){
	var popupWin;
	popupWin = window.open(url,name,status);
}




/* set event
============================================================*/
if(window.addEventListener){
	window.addEventListener("load",setRollOver,false);
}else if(window.attachEvent){
	window.attachEvent("onload",setRollOver);
}


/* close window function
============================================================*/
function closeWindow(){
	window.opener = true;
	window.close();
}


/*--------------------------------------------------------------------------*
 *  
 *  alphafilter JavaScript Library beta5
 *  
 *  MIT-style license. 
 *  
 *  2007 Kazuma Nishihata 
 *  http://www.webcreativepark.net
 *  
 *--------------------------------------------------------------------------*/

new function(){

	if(window.addEventListener){
		window.addEventListener('load',alphafilter,false);
	}else if(window.attachEvent){
		window.attachEvent('onload',alphafilter);
	}
	
	function alphafilter(){
		if (typeof document.body.style.maxHeight == "undefined") {//for old ie
			var elements = getElementsByClassName("alphafilter");
			for (var i=0; i<elements.length; i++) {
				var element = elements[i];
				if(element.nodeName=="IMG"){
					var newimg           = document.createElement("b");
					for(var key in element.currentStyle){
						newimg.style[key]=element.currentStyle[key];
					}
					newimg.className     = element.className;
					newimg.style.display = "inline-block";
					newimg.style.width   = element.width;
					newimg.style.height  = element.height;
					newimg.style.float   = element.align;
					newimg.style.filter  = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src="+element.src+",sizingMethod='scale')";
					element.parentNode.replaceChild(newimg,element);
				}else{
					var anchors = element.getElementsByTagName("a");
					for (var j=0; j<anchors.length; j++) {
						var anchor = anchors[j];
						anchor.style.position="relative";
					}
					var iputs = element.getElementsByTagName("input");
					for (var j=0; j<iputs.length; j++) {
						var iput = iputs[j];
						iput.style.position="relative";
					}
					var iputs = element.getElementsByTagName("textarea");
					for (var j=0; j<iputs.length; j++) {
						var iput = iputs[j];
						iput.style.position="relative";
					}
					var iputs = element.getElementsByTagName("select");
					for (var j=0; j<iputs.length; j++) {
						var iput = iputs[j];
						iput.style.position="relative";
					}
					var  newimg = element.currentStyle.backgroundImage || element.style.backgroundImage;
					newimg.match(/^url[("']+(.*\.png)[)"']+$/i)
					var newimg = RegExp.$1;
					element.style.filter ="progid:DXImageTransform.Microsoft.AlphaImageLoader(src="+newimg+",sizingMethod='image')";
					element.style.background = "none";
				}
			}
		}
	}
	
	function getElementsByClassName(className){
		var i, j, eltClass;
		var objAll = document.getElementsByTagName ? document.getElementsByTagName("*") : document.all;
		var objCN = new Array();
		for (i = 0; i < objAll.length; i++) {
			eltClass = objAll[i].className.split(/\s+/);
			for (j = 0; j < eltClass.length; j++) {
				if (eltClass[j] == className) {
					objCN.push(objAll[i]);
					break;
				}
			}
		}
		return objCN;
	}
}


img = new Array();
img[0] = "http://edna.jp/img/main09.jpg";
img[1] = "http://edna.jp/img/main08.jpg";
img[2] = "http://edna.jp/img/main10.jpg";
img[3] = "http://edna.jp/img/main11.jpg";
img[4] = "http://edna.jp/img/main12.jpg";
img[5] = "http://edna.jp/img/main13.jpg";
img[6] = "http://edna.jp/img/main14.jpg";
function setBanner(){
	amount = img.length;
	No = Math.floor(Math.random()*amount);
	document.write("<img src='" + img[No] + "' border='0' width='980'  height='380' alt='edna surfboards'>");
}