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js实现鼠标点击左上角滑动菜单效果代码

May 16, 2016 pm 03:40 PM

js 滑动菜单鼠标点击

这篇文章主要介绍了js实现鼠标点击左上角滑动菜单效果代码，涉及JavaScript基于鼠标事件动态变换页面元素样式的技巧，具有一定参考借鉴价值，需要的朋友可以参考下，具体如下：

这里需要鼠标点击激活的网页左上角菜单，不点击不会滑出来，可以改造成二级菜单。

运行效果截图如下：

在线演示地址如下：

http://demo.jb51.net/js/2015/js-click-hd-show-menu-style-codes/

具体代码如下：

&lt;!DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot;
&quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot;&gt;
&lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
&lt;head&gt;
&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=utf-8&quot; /&gt;
&lt;title&gt;左上角导航菜单&lt;/title&gt;
 &lt;style type=&quot;text/css&quot;&gt;
#pMenu0 {position:absolute; top:0px; left:30px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;}
#pMenu1 {position:absolute; top:0px; left:150px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;}
#pMenu2 {position:absolute; top:0px; left:250px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;} 
&lt;/style&gt;
&lt;script language=&quot;javascript&quot;&gt;
function lib_bwcheck(){ //Browsercheck (needed)
 this.ver=navigator.appVersion
 this.agent=navigator.userAgent
 this.dom=document.getElementById?1:0
 this.opera5=this.agent.indexOf(&quot;Opera 5&quot;)&gt;-1
 this.ie5=(this.ver.indexOf(&quot;MSIE 5&quot;)&gt;-1 &amp;&amp; this.dom &amp;&amp; !this.opera5)?1:0; 
 this.ie6=(this.ver.indexOf(&quot;MSIE 6&quot;)&gt;-1 &amp;&amp; this.dom &amp;&amp; !this.opera5)?1:0;
 this.ie4=(document.all &amp;&amp; !this.dom &amp;&amp; !this.opera5)?1:0;
 this.ie=this.ie4||this.ie5||this.ie6
 this.mac=this.agent.indexOf(&quot;Mac&quot;)&gt;-1
 this.ns6=(this.dom &amp;&amp; parseInt(this.ver) &gt;= 5) ?1:0; 
 this.ns4=(document.layers &amp;&amp; !this.dom)?1:0;
 this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
 return this
}
var bw=new lib_bwcheck()
var tMove=10;
var tSpeed=40
var tMoveOnScroll=true
var tShow=20
function makeMenu(obj,nest,show,move,speed){
 nest=(!nest) ? &quot;&quot;:&#39;document.&#39;+nest+&#39;.&#39;
 this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+&#39;document.&#39;+obj):0;
  this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+&#39;document.&#39;+obj):0;  
 this.x=this.css.left||this.css.pixelLeft||this.el.offsetLeft||0
 this.y=this.css.top||this.css.pixelTop||this.el.offsetTop||0
 this.state=1; this.go=0; this.mup=b_mup; this.show=show; this.mdown=b_mdown; 
 this.height=bw.ns4?this.css.document.height:this.el.offsetHeight
 this.moveIt=b_moveIt; this.move=move; this.speed=speed
 this.obj = obj + &quot;Object&quot;;  eval(this.obj + &quot;=this&quot;) 
}
var px = bw.ns4||window.opera?&quot;&quot;:&quot;px&quot;;
function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x+px; this.css.top=this.y+px;}
function b_mup(){
 if(this.y&gt;-this.height+this.show){
  this.go=1; this.moveIt(this.x,this.y-this.move)
  setTimeout(this.obj+&quot;.mup()&quot;,this.speed)
 }else{this.go=0; this.state=1} 
}
//Menu out
function b_mdown(){
 if(this.y&lt;eval(scrolled)){
  this.go=1; this.moveIt(this.x,this.y+this.move)
  setTimeout(this.obj+&quot;.mdown()&quot;,this.speed)
 }else{this.go=0; this.state=0} 
}
function moveTopMenu(num){
 if(!oMenu[num].go){
  if(!oMenu[num].state)oMenu[num].mup() 
  else oMenu[num].mdown()
 }
 for(i=0;i&lt;oMenu.length;i++){
  if(i!=num &amp;&amp; !oMenu[i].state){ oMenu[i].mup()}
 }
}
function checkScrolled(){
 for(i=0;i&lt;oMenu.length;i++){
  if(!oMenu[i].go){
   y=!oMenu[i].state?eval(scrolled):eval(scrolled)-oMenu[i].height+oMenu[i].show
   oMenu[i].moveIt(oMenu[i].x,y)
  }
 }
 if(bw.ns4||bw.ns6) setTimeout(&#39;checkScrolled()&#39;,40)
}
function topMenuInit(){
 oMenu=new Array()
 oMenu[0]=new makeMenu(&#39;pMenu0&#39;,&quot;&quot;,tShow,tMove,tSpeed) 
 oMenu[1]=new makeMenu(&#39;pMenu1&#39;,&quot;&quot;,tShow,tMove,tSpeed) //*
 oMenu[2]=new makeMenu(&#39;pMenu2&#39;,&quot;&quot;,20,10,20) //*
 scrolled=bw.ns4||bw.ns6?&quot;window.pageYOffset&quot;:&quot;document.body.scrollTop&quot;
 for(i=0;i&lt;oMenu.length;i++){
  oMenu[i].moveIt(oMenu[i].x,-oMenu[i].height+oMenu[i].show)
  oMenu[i].css.visibility=&#39;visible&#39;
 }
 if(tMoveOnScroll) bw.ns4||bw.ns6?checkScrolled():window.onscroll=checkScrolled;
}
onload=topMenuInit;
&lt;/script&gt;
&lt;p id=&quot;pMenu0&quot;&gt;
 &lt;!-- You can just replace this text with some cool images if you want --&gt;
 &lt;a href=&quot;javascript://&quot;&gt;链接一&lt;/a&gt;&lt;br&gt;&lt;br&gt;
 &lt;a href=&quot;javascript://&quot;&gt;链接二&lt;/a&gt;&lt;br&gt;&lt;br&gt;
 &lt;a href=&quot;javascript://&quot;&gt;链接三&lt;/a&gt;&lt;br&gt;&lt;br&gt;
 &lt;a href=&quot;javascript://&quot;&gt;链接四&lt;/a&gt;&lt;br&gt;&lt;br&gt;
 &lt;a href=&quot;#&quot; onclick=&quot;moveTopMenu(0); return false&quot;&gt;菜单一&lt;/a&gt;
&lt;/p&gt;
&lt;p id=&quot;pMenu1&quot;&gt;
 &lt;!-- You can just replace this text with some cool images if you want --&gt;
 这是第二个菜单的内容&lt;br&gt;&lt;br&gt;
 &lt;a href=&quot;#&quot; onmouseover=&quot;moveTopMenu(1)&quot;&gt;菜单二&lt;/a&gt;
&lt;/p&gt;
&lt;p id=&quot;pMenu2&quot;&gt;
 &lt;!-- You can just replace this text with some cool images if you want --&gt;
 这是第三个菜单的内容&lt;br&gt;
 &lt;a href=&quot;#&quot; onclick=&quot;moveTopMenu(2); return false&quot;&gt;菜单三&lt;/a&gt;
&lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;

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