// javascript document
 function createxhr() {
	if (typeof xmlhttprequest != 'undefined') {
		return new xmlhttprequest();
	} else if (typeof activexobject != 'undefined') {
		var version = [
									'msxml2.xmlhttp.6.0',
									'msxml2.xmlhttp.3.0',
									'msxml2.xmlhttp'
		];
		for (var i = 0; version.length; i ++) {
		  try {
			return new activexobject(version[i]);
		  } catch (e) {
		  }	
		}
	} else {
	  throw new error('您的系统或浏览器不支持xhr对象！');
	}
 }
 function paramsjoin(data) {
	var arr = [];
	for (var i in data) {
	  arr.push(encodeuricomponent(i) + '=' + encodeuricomponent(data[i]));
	}
	return arr.join('&');
 }
 function ajax(obj) {
	var xhr = createxhr();
	obj.url = obj.url + '/rand/' + math.random();
	obj.data = paramsjoin(obj.data);
	if (obj.method === 'get') obj.url += obj.url.indexof('?') == -1 ? '/' + obj.data : '/' + obj.data;
	if (obj.async === true) {
	  xhr.onreadystatechange = function () {
		  if (xhr.readystate == 4) {
			 callback();
		  }
	  };
	}
	xhr.open(obj.method, obj.url, obj.async);
	if (obj.method === 'post') {
	  xhr.setrequestheader('content-type', 'application/x-www-form-urlencoded');
	  xhr.send(obj.data);	
	} else {
	  xhr.send(null);
	}
	if (obj.async === false) {
	  callback();
	}
	function callback() {
	  if (xhr.status == 200) {
		obj.success(xhr.responsetext);
	  } else {
	    alert('获取数据错误！错误代号：' + xhr.status + '，错误信息：' + xhr.statustext,'error');
	  }	
	}
 }
 //创建遮罩层
 function cmask(){
   var w = $(window).width();
   var h = $(window).height();
   $("body").append('<div style="width:'+w+'px;height:'+h+'px" class="cscreen" id="vmask"></div>');
 }
 //隐藏遮罩层
 function hide(){
   $("#vmask").hide().remove();
 }
 //滚动及左右切换
 function switch_div(wraper,prev,next,img,speed,or){	
	var wraper = $(wraper);
	var prev   = $(prev);
	var next   = $(next);
	var img    = $(img).find('ul');
	var w      = img.find('li').outerwidth(true);
	var s      = speed;
	next.click(function(){
						 img.animate({'margin-left':-w},function(){
						  	img.find('li').eq(0).appendto(img);
							img.css({'margin-left':0});
						 });
						});
	prev.click(function(){
						  img.find('li:last').prependto(img);
						  img.css({'margin-left':-w});
						  img.animate({'margin-left':0});
						});
	if (or == true){
	  ad = setinterval(function() { next.click();},s*1000);
	  wraper.hover(function(){clearinterval(ad);},function(){ad = setinterval(function() { next.click();},s*1000);});
	}
 }
 $(document).ready(function(e) {
   $.post( think+'/index/visitstatistics', {},function(data){return true;},'json'); //访问统计信息 
 });