js实现鼠标点击左上角滑动菜单效果代码

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：
<!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><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>左上角导航菜单</title> <style type="text/css">#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;} </style><script language="javascript">function lib_bwcheck(){ //browsercheck (needed) this.ver=navigator.appversion this.agent=navigator.useragent this.dom=document.getelementbyid?1:0 this.opera5=this.agent.indexof("opera 5")>-1 this.ie5=(this.ver.indexof("msie 5")>-1 && this.dom && !this.opera5)?1:0; this.ie6=(this.ver.indexof("msie 6")>-1 && this.dom && !this.opera5)?1:0; this.ie4=(document.all && !this.dom && !this.opera5)?1:0; this.ie=this.ie4||this.ie5||this.ie6 this.mac=this.agent.indexof("mac")>-1 this.ns6=(this.dom && parseint(this.ver) >= 5) ?1:0; this.ns4=(document.layers && !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=40var tmoveonscroll=truevar tshow=20function makemenu(obj,nest,show,move,speed){ nest=(!nest) ? "":'document.'+nest+'.' this.el=bw.dom?document.getelementbyid(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0; this.css=bw.dom?document.getelementbyid(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+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 + "object"; eval(this.obj + "=this") }var px = bw.ns4||window.opera?"":"px";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>-this.height+this.show){ this.go=1; this.moveit(this.x,this.y-this.move) settimeout(this.obj+".mup()",this.speed) }else{this.go=0; this.state=1} }//menu outfunction b_mdown(){ if(this.y<eval(scrolled)){ this.go=1; this.moveit(this.x,this.y+this.move) settimeout(this.obj+".mdown()",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<omenu.length;i++){ if(i!=num && !omenu[i].state){ omenu[i].mup()} }}function checkscrolled(){ for(i=0;i<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('checkscrolled()',40)}function topmenuinit(){ omenu=new array() omenu[0]=new makemenu('pmenu0',"",tshow,tmove,tspeed) omenu[1]=new makemenu('pmenu1',"",tshow,tmove,tspeed) //* omenu[2]=new makemenu('pmenu2',"",20,10,20) //* scrolled=bw.ns4||bw.ns6?"window.pageyoffset":"document.body.scrolltop" for(i=0;i<omenu.length;i++){ omenu[i].moveit(omenu[i].x,-omenu[i].height+omenu[i].show) omenu[i].css.visibility='visible' } if(tmoveonscroll) bw.ns4||bw.ns6?checkscrolled():window.onscroll=checkscrolled;}onload=topmenuinit;</script><p id="pmenu0">  <a href="javascript://">链接一</a><br><br> <a href="javascript://">链接二</a><br><br> <a href="javascript://">链接三</a><br><br> <a href="javascript://">链接四</a><br><br> <a href="#" onclick="movetopmenu(0); return false">菜单一</a></p><p id="pmenu1">  这是第二个菜单的内容<br><br> <a href="#" onmouseover="movetopmenu(1)">菜单二</a></p><p id="pmenu2">  这是第三个菜单的内容<br> <a href="#" onclick="movetopmenu(2); return false">菜单三</a></p></body></html>
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js实现鼠标点击左上角滑动菜单效果代码

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