/*

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

/* ブラウザ環境変数取得
--------------------------------------*/
var ua = navigator.userAgent.toLowerCase();


/* ショートカット関数
--------------------------------------*/
function getId(ID) {
	if (!document.getElementById) return;
	return document.getElementById(ID);
}

/* Cookie制御
--------------------------------------*/
function createCookie(name,value) {
	var date = new Date();
	var expires = '; expires=Tue, 1-Jan-2030 00:00:00 GMT;';
		//2030年1月1日（火）を有効期限に指定（無期限）
	document.cookie = name+'='+value+expires+'; path=/';
}

function readCookie(name) {
  var nameEQ = name + '=';
  var cItem = document.cookie.split(';');
  for(var i=0, l=cItem.length; i<l; i++) {
    var c = cItem[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ)==0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}


/* 文字の大きさ制御
   (with jQuery)
--------------------------------------*/
var fontSize = {
	value: (readCookie('font_size') == 'large') ? 'large' : 'small',
	btnImgS_oj: new Image(),
	btnImgL_oj: new Image(),
	btnImgS_on_oj: new Image(),
	btnImgL_on_oj: new Image(),
	btnImgS: 'http://www.omasa.org/img/fontsize_s.gif',
	btnImgL: 'http://www.omasa.org/img/fontsize_l.gif',
	btnImgS_on: 'http://www.omasa.org/img/fontsize_s_over.gif',
	btnImgL_on: 'http://www.omasa.org/img/fontsize_l_over.gif',
	code: function() {
		var btnS = this.btnImgS;
		var btnL = this.btnImgL;
		if (this.value == 'large') btnL = this.btnImgL_on;
		else btnS = this.btnImgS_on;
		
		var str = '';
		str += '<p><img src="http://www.omasa.org/img/fontsize_title.gif" alt="文字の大きさを変更する" width="80" height="16"></p>';
		str += '<ul>';
		str += '<li class="small"><a href="javascript:;"><img '+'s'+'r'+'c'+'="' + btnS + '" alt="文字の大きさ「小」" id="btnSmall"></a></li>';
		str += '<li class="large"><a href="javascript:;"><img '+'s'+'r'+'c'+'="' + btnL + '" alt="文字の大きさ「大」" id="btnLarge"></a></li>';
		str += '</ul>';
		
		document.write(str);
	},
	set: function() {
		var element = getId('font-size-change');
		var btnS = getId('btnSmall');
		var btnL = getId('btnLarge');
		var self = this;
		if(!element) return false;
	
		var btnS_on = function() {
			btnS.src = self.btnImgS_on;
			btnS.onmouseover = function() {return false;}
			btnS.onmouseout  = function() {return false;}
			btnL.src = self.btnImgL;
			btnL.onmouseover = function() {this.src = self.btnImgL_on;};
			btnL.onmouseout  = function() {this.src = self.btnImgL;};
		}
		var btnL_on = function() {
			btnS.src = self.btnImgS;
			btnS.onmouseover = function() {this.src = self.btnImgS_on;};
			btnS.onmouseout  = function() {this.src = self.btnImgS;};
			btnL.src = self.btnImgL_on;
			btnL.onmouseover = function() {return false;}
			btnL.onmouseout  = function() {return false;}
		}
		
		var a = element.getElementsByTagName('a');
		a[0].onclick = function() {
			self.value = "small";
			createCookie('font_size', self.value);
			jQuery('body').removeClass('large').addClass('small');
			btnS_on();
		}
		a[1].onclick = function() {
			self.value = 'large';
			createCookie('font_size', self.value);
			jQuery('body').removeClass('small').addClass('large');
			btnL_on();
		}
		if (self.value == 'large') {
			jQuery('body').removeClass('small').addClass('large');
			btnL_on();
		}
		else {
			jQuery('body').addClass('small');
			btnS_on();
		}
	}
}
// ボタンのプリロード
fontSize.btnImgS_oj.src = fontSize.btnImgS;
fontSize.btnImgL_oj.src = fontSize.btnImgL;
fontSize.btnImgS_on_oj.src = fontSize.btnImgS_on;
fontSize.btnImgL_on_oj.src = fontSize.btnImgL_on;





/* MM_swapImg / MM_preloadImages
   (Macromedia Dreamweaver Script)
--------------------------------------*/
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}




/* ロールオーバースクリプト
   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, l=aImages.length; i<l; i++) {		
		if (aImages[i].className == 'btn') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var srcOn = src.substring(src.length-(ftype.length+3), src.length);
			if (srcOn == '_on'+ftype) return;
			var hsrc = src.replace(ftype, '_on'+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('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}


/* ウィンドウ読み込み時の処理
--------------------------------------*/
jQuery(function() {
	fontSize.set();
	initRollovers();
});
window.onunload = function() {
 createCookie("font_size", fontSize.value);
}

jQuery.noConflict();