// JavaScript Document
// http://www.mdn.co.jp/webcre/Tips/Vol36/
// web creators 12月号
// 仕掛けで見せる! WEBデザインTIPS ＆ TRICS 
// 1. フォントサイズをワンクリックで変更する 


var Default = 2;
var tags    = 
new Array('div','td','tr');
var sizing  = new Array('xx-small','x-small','small','medium','large','x-large','xx-large');

function FontChange(target,tarF) {
  if (!document.getElementById) return
  var dore = document,tarS = null,fontSize = Default,value,su,cTags;fontSize += tarF;
  if (fontSize < 0) fontSize = 0;
  if (fontSize > 6) fontSize = 6;
  Default = fontSize;
  if (!(tarS = dore.getElementById(target))) tarS = dore.getElementsByTagName(target)[0];
  tarS.style.fontSize = sizing[fontSize];
  for (value = 0 ; value < tags.length ; value++) {
    cTags = tarS.getElementsByTagName(tags[value]);
    for (su = 0 ; su < cTags.length ; su++) cTags[su].style.fontSize = sizing[fontSize];
  }
}


/* Rollover Menu */
/* メニュー部分のロールオーバー */

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 == 'btn') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_act'+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('_act'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;




/* window.open */
/* 別窓を開く指示 */

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}