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(';');
  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;
}

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);

//totop

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);
    }
}



/*
	Link Target Preferences v.1.1
	http://www.noscope.com/journal/2004/10/link-target-preferences
*/

// BEGIN Configuration
	// The following URLs are considered "on-site", and will be ignored
	// Consider adding both your main URL and the no-ww URL
	var url_1 = "http://www.yutheme.cn";
	var url_2 = "http://yutheme.cn";

	// Default link-target preference. What should be default for new users?
	// Value true opens in _blank by default, false opens in _top by default
	var open_blank_default = true;
	
	// Website title - used only for cookie name to prevent cookie conflicts with other sites using this
	// No spaces, no special characters, just a unique name
	var site_title = "yutheme";
// END Configuration

// Cookie Functions
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 var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
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;
}
function eraseCookie(name) {
	createCookie(name,"",-1);
}
// Checkbox Loader
function loadLinkPrefs () {
	if (readCookie(site_title+"_linkprefs_cookie")) {
		initVal = readCookie(site_title+"_linkprefs_cookie");	// Load cookied preference
	} else {
		createCookie(site_title+"_linkprefs_cookie", true, 20000)
		initVal = open_blank_default;	// If no cookie is set
	}
	openBlank = initVal;
	setCheckbox(eval(initVal))
}
// Set Checkbox State
function setCheckbox(state) {
	openBlank = state;
	document.getElementById('linkprefs').checked = state;
	setTargets();
	createCookie(site_title+"_linkprefs_cookie", state, 20000)
}
// Configure Link Targets
function setTargets() {
	var link, l = 0;
	if (openBlank == true) {
		while (link = document.links[l++]) {
			// Open in _blank, except all links starting with...
			if (link.href.indexOf(url_1) == -1 && link.href.indexOf(url_2) == -1 && link.href.indexOf('javascript') == -1) link.target = '_blank'; 
		}
	} else {
		while (link = document.links[l++]) {
			// Open in _top, except all links starting with...
			if (link.href.indexOf(url_1) == -1 && link.href.indexOf(url_2) == -1 && link.href.indexOf('javascript') == -1) link.target = '_top'; 
		}
	}
}
// Event Listener, by Scott Andrew
function addEvent(obj, evType, fn) {
	if (obj.addEventListener) {
		obj.addEventListener(evType, fn, true);
		return true;
	} else if (obj.attachEvent) {
		var r = obj.attachEvent('on'+evType, fn);
		return r;
	} else {
		return false;
	}
}


//linkoption
var _bool=0;
function linkoptionbutton()
{
   if(_bool==1)
   {
      document.getElementById("link_option").style.display="none";
      _bool=0;
   }
   else if(_bool==0)
   {
       document.getElementById("link_option").style.display="block";
      _bool=1;
   }
}