//<![CDATA[
		   
function returnToTop() {
  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("returnToTop()", 25);
  }
}

function addEvent (elm, listener, func) {
	try {
		elm.addEventListener(listener, func, false);
	}
	catch(e) {
		elm.attachEvent("on" + listener, func);
	}
}

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

var cookie;
var defaultFontSize;
var ratio;

function changeFontSizeAsOnload() {
	cookie = readCookie('fontSize');
	defaultFontSize = cookie ? cookie : 80;
	changeFontSize(0);
}

function setCookieUnload() {
	setCookie('fontSize', defaultFontSize, 365);
}

addEvent(window, 'load'   , changeFontSizeWhenOnload);
addEvent(window, 'unload' , setCookieWhenUnload);

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

/* add favorite --------------------------------------------------------------*/
function addFavorite() {
	var url  = 'http://www.gyoukai.com/';
	var name = 'インタビューマガジン 業界pod';
	
	if (navigator.userAgent.indexOf('MSIE') > -1) {
		window.external.AddFavorite(url, name);
	}
	else if(navigator.userAgent.indexOf('Firefox') > -1) {
	// Firefox
		window.sidebar.addPanel(name, url, '');
	}
}


/* set cookie ----------------------------------------------------------------*/
function setCookie(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=/';
}

/* read cookie ---------------------------------------------------------------*/
function readCookie(name) {
	var nameEQ = name + '=';
	var ca = document.cookie.split(';');
	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;
}

/* change font size ----------------------------------------------------------*/
function changeFontSize(ratio) {
	if (ratio == 100) {
		defaultFontSize = 80;
	}
	else {
		if (50 < parseInt(defaultFontSize) && parseInt(ratio) < 0 ) {
			defaultFontSize = parseInt(defaultFontSize) + parseInt(ratio);
		}
		if (0 < parseInt(ratio) && parseInt(defaultFontSize) < 110) {
			defaultFontSize = parseInt(defaultFontSize) + parseInt(ratio);
		}
	}
	
	document.body.style.fontSize = defaultFontSize + '%';
}


/* Show Hide ----------------------------------------------------------------*/
function showHide(targetID) { 
  if( document.getElementById(targetID)) { 
    if( document.getElementById(targetID).style.display == "block") {
      document.getElementById(targetID).style.display = "none";
    }
	else {
      document.getElementById(targetID).style.display = "block";
    }
  }
}



/* change font size when onload-----------------------------------------------*/
function changeFontSizeWhenOnload() {
	cookie = readCookie('fontSize');
	defaultFontSize = cookie ? cookie : 80;
	changeFontSize(0);
}

/* set font size cookie when onload ------------------------------------------*/
function setCookieWhenUnload() {
	setCookie('fontSize', defaultFontSize, 365);
}

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



//]]>