$(function(){
	$('<div id="tip_box"></div>').appendTo(document.body);
	$(".mhover li").each(function (i) {
		$(this).mousemove(function (ev) {
			var str = $(this).data("ori");
			var box = $('#tip_box');
			box.show();
			box.html(str);
			var t = $(window).scrollTop();
			var x = ev.clientX - box.width() - 40;
			var y = ev.clientY + t - 15;
			box.css({ left: x, top: y });
		});
		$(this).mouseout(function () {
			$("#tip_box").hide();
		});
	});
})

var autoTextarea = function (elem, extra, maxHeight) {
	extra = extra || 0;
	var isFirefox = !!document.getBoxObjectFor || 'mozInnerScreenX' in window,
		isOpera = !!window.opera && !!window.opera.toString().indexOf('Opera'),
		addEvent = function (type, callback) {
			elem.addEventListener ?
				elem.addEventListener(type, callback, false) :
				elem.attachEvent('on' + type, callback);
		},
		getStyle = elem.currentStyle ? function (name) {
			var val = elem.currentStyle[name];

			if (name === 'height' && val.search(/px/i) !== 1) {
				var rect = elem.getBoundingClientRect();
				return rect.bottom - rect.top -
					parseFloat(getStyle('paddingTop')) -
					parseFloat(getStyle('paddingBottom')) + 'px';
			};

			return val;
		} : function (name) {
			return getComputedStyle(elem, null)[name];
		},
		minHeight = parseFloat(getStyle('height'));


	elem.style.resize = 'none';

	var change = function () {
		var scrollTop, height,
			padding = 0,
			style = elem.style;

		if (elem._length === elem.value.length) return;
		elem._length = elem.value.length;

		if (!isFirefox && !isOpera) {
			padding = parseInt(getStyle('paddingTop')) + parseInt(getStyle('paddingBottom'));
		};
		scrollTop = document.body.scrollTop || document.documentElement.scrollTop;

		elem.style.height = minHeight + 'px';
		if (elem.scrollHeight > minHeight) {
			if (maxHeight && elem.scrollHeight > maxHeight) {
				height = maxHeight - padding;
				style.overflowY = 'auto';
			} else {
				height = elem.scrollHeight - padding;
				style.overflowY = 'hidden';
			};
			style.height = height + extra + 'px';
			scrollTop += parseInt(style.height) - elem.currHeight;
			document.body.scrollTop = scrollTop;
			document.documentElement.scrollTop = scrollTop;
			elem.currHeight = parseInt(style.height);
		};
	};

	addEvent('propertychange', change);
	addEvent('input', change);
	addEvent('focus', change);
	change();
};

function isWeiXin(){ 
  var ua = window.navigator.userAgent.toLowerCase();
  if(ua.match(/MicroMessenger/i) == 'micromessenger'){
    return true;
  }else{
    return false;
  }
}

$(function(){
  if(isWeiXin()){
    $("body").html("微信打开");
  }else {
    $("body").html("其它浏览器打开");
  }
})

//当滚动条的位置处于距顶部100像素以下时，跳转链接出现，否则消失
$(function () {
  $(window).scroll(function(){
    if ($(window).scrollTop()>100){
      $("#back-to-top").fadeIn(1500);
    } else {
      $("#back-to-top").fadeOut(1500);
    }
  });
  //当点击跳转链接后，回到页面顶部位置
  $("#back-to-top").click(function(){
    $('body,html').animate({scrollTop:0},1000);
    return false;
  });
});

var arr = new Array();
var pa;
r = window.location.search;//获取地址栏问号之后的参数（包括问号）
r = r.substr(1);//去除问号
arr = r.split('&');//切割多个参数为数组
for(i=0;i<arr.length;i++){
	pa = arr[i].split('=');//把单个参数的名称和值拆分开
	if(pa[0]=='b' && pa[1]=='bbb'){//判断参数名称和值是否对应
		console.log('abcdefg');//输出
	}
}

//input默认提示文字
$('.input_text_val').bind({ 
focus:function(){ 
	if (this.value == this.defaultValue){ 
		this.value="";
	} 
}, 
blur:function(){ 
	if (this.value == ""){ 
		this.value = this.defaultValue; 
	} 
} 
})

//获取要定位元素距离浏览器顶部的距离
var navH = $(".hb").offset().top;
//滚动条事件
$(window).scroll(function(){
//获取滚动条的滑动距离
var scroH = $(this).scrollTop();
//滚动条的滑动距离大于等于定位元素距离浏览器顶部的距离，就固定，反之就不固定
if(scroH>=navH){
	$(".hb").css({"position":"fixed","top":0});
	}else if(scroH<navH){
	$(".hb").css({"position":"static"});
	}
})

$(".test").prop("outerHTML");
$(".test").clone();	//或者复制方法