JS实现从顶部下拉显示的带动画QQ客服特效代码

2019-11-20 11:25:11

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本文实例讲述了JS实现从顶部下拉显示的带动画QQ客服特效代码。分享给大家供大家参考，具体如下：

这是一款动画版QQ在线客服代码，从网页顶部下拉出来的QQ客服，下滑结束后有弹性缓冲效果。在世界地图的映衬下，似乎一下子上升了品位。动画效果是由jq实现的，QQ客服的一些信息自己修改下，换成你自己的QQ，上传到网页就可用啦。注：在火狐台chrome浏览器中测试效果会更好。

运行效果截图如下：

在线演示地址如下：

http://demo.VeVB.COm/js/2015/js-top-show-down-dh-qq-online-codes/

具体代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>网页顶部下拉的jquery在线客服</title><style>*{margin: 0px;padding: 0px;list-style: none;}#qqlist a{text-decoration: none;color: black;font-size: 12px;display: block;line-height: 28px;vertical-align: middle;}img{line-height: 28px;vertical-align: middle;text-align: center;padding-bottom: 6px;}#cs{width: 100%;height: 0px;border-bottom: 3px solid red;-webkit-box-shadow: 2px 2px 2px #999;position: relative;top: 0px;-moz-box-shadow: 2px 2px 2px #999;box-shadow: 2px 2px 2px #999;}#qqlist{position: absolute;left: -200px;top: 150px;z-index: 1;}#qqlist ul li{width: 80px;height: 28px;margin: 10px;}#bg{width: 918px;height: 500px;position: absolute;right: 10px;display: none;filter: alpha(opacity: 0);opacity: 0;}#btn{width: 100px;height: 20px;margin: auto;background: red;-webkit-box-shadow: 2px 2px 2px #999;border-radius: 0 0 8px 8px;position: relative;top: 0px;-moz-box-shadow: 2px 2px 2px #999;box-shadow: 2px 2px 2px #999;}#btn span{display: block;color: white;text-align: center;line-height: 20px;cursor: pointer;font-size: 12px;}#foot_bm a, #foot_bm, p, p a{color: #666;position: relative;}</style><script>function startMove(obj,json,fnEnd){ clearInterval(obj.timer); obj.timer=setInterval(function() {  var bStop=true;  for (var attr in json)  {   var now=0;   if(attr=="opacity")   {    now=Math.round(parseFloat(getStyle(obj,attr))*100);   }   else   {    now=parseInt(getStyle(obj,attr));   }   var speed=(json[attr]-now)/10;   speed=speed>0?Math.ceil(speed):Math.floor(speed);   if(now!=json[attr])bStop=false;   if(attr=="opacity")   {    obj.style.filter="alpha(opacity:"+(now+speed)+")";    obj.style.opacity=(now+speed)/100;   }   else   {    obj.style[attr]=(now+speed)+"px";   }  }  if(bStop)  {   clearInterval(obj.timer);   if(fnEnd)fnEnd();  } }, 30)}function startFlex(obj,json,fnEnd){ clearInterval(obj.timer); obj.timer=setInterval(function() {  var bStop=true;  var cur=0;  for(var attr in json)  {   if(!obj.oSpeed)obj.oSpeed={};   if(!obj.oSpeed[attr])obj.oSpeed[attr]=0;   cur=parseInt(getStyle(obj,attr));   if(Math.abs(json[attr]-cur)>1 || Math.abs(obj.oSpeed[attr])>1)   {    bStop=false;    obj.oSpeed[attr]+=(json[attr]-cur)/5;    obj.oSpeed[attr]*=0.7;    var maxSpeed=65;    if(Math.abs(obj.oSpeed[attr])>maxSpeed)    {     obj.oSpeed[attr]=obj.oSpeed[attr]>0?maxSpeed:-maxSpeed;    }    obj.style[attr]=cur+obj.oSpeed[attr]+"px";   }  }   if(bStop)  {   clearInterval(obj.timer);   if(fnEnd)fnEnd();  } }, 30);}function getStyle(obj,name){ if(obj.currentStyle) {  return obj.currentStyle[name]; } else {  return getComputedStyle(obj,false)[name]; }}window.onload=function(){ var oCs=document.getElementById('cs'); var oBtn=document.getElementById('btn').getElementsByTagName('span')[0]; var oImg=document.getElementById('bg'); var oLi=document.getElementById('qqlist').getElementsByTagName('li'); var on=0; for(var i=0; i<oLi.length; i++) {  oLi[i].style.left=oLi[i].offsetLeft+"px";  oLi[i].style.top=oLi[i].offsetTop+"px"; } for(var i=0; i<oLi.length; i++) {  oLi[i].style.position="absolute";  oLi[i].style.margin=0; } function showImg() {  oImg.style.display="block";  startMove(oImg,{opacity:80},function()  {   showQQ(350);  }); } function showQQ(iTarget) {  var i=1;  startFlex(oLi[0],{left:iTarget});  timer=setInterval(function()  {   startFlex(oLi[i],{left:iTarget});   i++;   if(i>=oLi.length)   {    clearInterval(timer);   }  }, 20); } oBtn.onclick=function() {  if(on==0)  {   startFlex(oCs,{height:500},function()   {    showImg();    oBtn.innerHTML="CLOSE";   });   on=1;  }  else  {   showQQ(-200);   timer2=setInterval(function()   {    startMove(oImg,{opacity:0},function()    {     oImg.style.display="none";     startMove(oCs,{height:0});    })    if(oCs.style.height==0+"px")    {     clearInterval(timer2);     oBtn.innerHTML="CONTACT US";    }   },500);    on=0;  } }}</script></head><body><div id="cs"> <div id="qqlist">  <ul>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的网站"/> 售前咨询</a></li>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的站名"/> 售前咨询</a></li>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的站名"/> 售前咨询</a></li>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的站名"/> 售前咨询</a></li>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的站名"/> 售前咨询</a></li>   <li><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456789&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:123456789:52" alt="点这里发消息" title="您的站名"/> 售前咨询</a></li>  </ul> </div> <div id="bg"><img src="images/bgbg.png"/></div></div><div id="btn"><span>联系我们</span></div></body></html>

希望本文所述对大家JavaScript程序设计有所帮助。

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