/*
自動ロールオーバー スクリプト
classname：imgタグに設定するclass名
activekey：ロールオーバー画像名に付加するルール
	EX
	<img src=choco.jpg class="btn">
	----
	onmouseover = choco_a.jpg
	onmouseout = choco.jpg
*/





var classname='rollover';
var activekey='_a';









//class名をリストに
document.getElementsByClassName = function(className) {
	var elementsAll = document.getElementsByTagName('*') || document.all;
	if(!document.getElementsByTagName('*').length){elementsAll =document.all;}
	var elements = new Array();
	for(var i = 0; i < elementsAll.length; i++) {
		var classNames = elementsAll[i].className.split(' ');
		for(var j = 0; j < classNames.length; j++) {
			if (classNames[j] == className) {
				elements[elements.length] = elementsAll[i];
				break;
			}
		}
	}
	return elements;
}





	var preimgArray=new Array();
	
	var btns=new Array();
	
	if(document.getElementById){
	
		btns=document.getElementsByClassName(classname);

		for (i=0;i<btns.length;i++){

			btns[i].srco=btns[i].src;
			
			var s = ""+btns[i].src;
			s = s.replace( /(.+)(\.gif|\.jpg|\.jpeg|\.png)$/ig , "$1"+activekey+"$2" );
				
			btns[i].srca=s;
				
				
			
			if(  s.match( /(.+)(\.gif|\.jpg|\.jpeg|\.png)$/ig )   ){


				if(   ! btns[i].srco.match( activekey + '[.]'  )  ){
					btns[i].onmouseover = function(){
						if(this.srca)this.src=this.srca;	
						//this.style.marginLeft='10px';
						//alert(this.style.paddingLeft);
					}
					btns[i].onmouseout = function(){
						if(this.srco)this.src=this.srco;
						//this.style.marginLeft='0';
					}
				
				}
			}
			
			
			preimgArray[i]=new Image();
			preimgArray[i].src=s;//preload		
		}

	}




	


/*-----------------------------------------------------------------------------------------

UTIL

-----------------------------------------------------------------------------------------*/
function $(tagId)
{
	return document.getElementById(tagId);
}
function toggleblock(tagId){

	if($(tagId).style.display=='none' ||  $(tagId).style.display==''){
		$(tagId).style.display='block';
	}else{
		$(tagId).style.display='none';
	}
}





	function openWinS(url,w,h){
	window.open(url,"","width="+w+",height="+h+",toolbar=no,location=no,derectories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes");
	}	
	function openWinNS(url,w,h){
	window.open(url,"","width="+w+",height="+h+",toolbar=no,location=no,derectories=no,status=yes,menubar=no,scrollbars=no,resizable=yes");
	}	
	

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);
  }
}

/*-----------------------------------------------------------------------------------------

//UTIL








function chkbg(){
	if (document.styleSheets[3].cssRules){
		var cssobj=document.styleSheets[3].cssRules[0];
	}else{
		var cssobj=document.styleSheets[3].rules[0];	
	}
	
	if(cssobj){
		path=cssobj.style.backgroundImage.replace(   /(url\(\s*?)(.*)(\s*?\))/ig,'$2'      );
		var img=new Image;
			img.src=path;
			return img.complete;
			//if(img.complete==false){

				//items=document.getElementsByClassName('linkitem');
				//for(var i=0 ;i<items.length;i++){
				//	items[i].style.textIndent='0';
				//}
			//}
	}
}






-----------------------------------------------------------------------------------------*/