/* 画像切り替え
--------------------------------------------------------------------------	*/

if (document.images) {
	s_off = new Image(); s_off.src = 'img_common/small_off.gif';
	s_on  = new Image(); s_on.src  = 'img_common/small_on.gif';
	m_off = new Image(); m_off.src = 'img_common/middle_off.gif';
	m_on  = new Image(); m_on.src  = 'img_common/middle_on.gif';
	b_off = new Image(); b_off.src = 'img_common/large_off.gif';
	b_on  = new Image(); b_on.src  = 'img_common/large_on.gif';

}

function HeadSwap(f_type) {
	if(f_type == "small"){
		document.images["s_img"].src=eval("s_on").src;
		document.images["m_img"].src=eval("m_off").src;
		document.images["b_img"].src=eval("b_off").src;
	}else if(f_type == "middle"){
		document.images["s_img"].src=eval("s_off").src;
		document.images["m_img"].src=eval("m_on").src;
		document.images["b_img"].src=eval("b_off").src;
	}else if(f_type == "big"){
		document.images["s_img"].src=eval("s_off").src;
		document.images["m_img"].src=eval("m_off").src;
		document.images["b_img"].src=eval("b_on").src;
	
	}
}

/* 6. 文字可変
--------------------------------------------------------------------------	*/

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}



function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  css_type = ca;
  for(var i=0;i < ca.length;i++) {
    var c = ca[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;
}


//ヘッダ部文字サイズ書き出し


function HeadImg(){

	var sonoff;
	var monoff;
	var bonoff;

	if(css_type == "style=default" || css_type == ""){
		sonoff="off";
		monoff="on";
		bonoff="off";
	}else if(css_type == "style=f_b"){
		sonoff="off";
		monoff="off";
		bonoff="on";
	}else if(css_type == "style=f_s"){
		sonoff="on";
		monoff="off";
		bonoff="off";
	}


	var f_src = "<table width=\"143\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\"><tr>";
	f_src += "<td><img src=\"images/font.jpg\" width=\"73\" height=\"24\" /></td>";
	f_src += " <td><a href=\"#\" onclick=\"setActiveStyleSheet('f_s');\" id=\"top\" class=\"small\"><img src=\"images/font_s.jpg\" alt=\"小\" width=\"23\" height=\"24\" /></a></td>";
	f_src += "<td><a href=\"#\" onclick=\"setActiveStyleSheet('default');\" id=\"top\" class=\"medium\"><img src=\"images/font_m.jpg\" alt=\"中\" width=\"23\" height=\"24\" /></a></td>";
	f_src += "<td><a href=\"#\" onclick=\"setActiveStyleSheet('f_b');\" name=\"top\" id=\"top\" class=\"large\"><img src=\"images/font_b.jpg\" alt=\"大\" width=\"24\" height=\"24\" /></a></td>";
	f_src += "</tr></table>";

	document.write(f_src);

	
}





window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);