58、左上角的菜单

58、左上角的菜单

脚本说明:

把如下代码加入<body>区域中

<style type="text/css">

#divMenu0 {position:absolute; top:0px; left:30px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;}

#divMenu1 {position:absolute; top:0px; left:150px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;}

#divMenu2 {position:absolute; top:0px; left:250px; visibility:hidden; font-family:arial,helvetica,sans-serif; font-size:18px; font-weight:bold;}

</style>

<script language="JavaScript" type="text/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()

//How many pixels should it move every step?

var tMove=10;

 

//At what speed (in milliseconds, lower value is more speed)

var tSpeed=40

 

//Do you want it to move with the page if the user scroll the page?

var tMoveOnScroll=true

 

//How much of the menu should be visible in the in state?

var tShow=20

 

/********************************************************************

Contructs the menuobjects -Object functions

*********************************************************************/

function 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") 

}

 

// A unit of measure that will be added when setting the position of a layer.

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;}

//Menu in

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 out

function 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}      

}

/********************************************************************************

Deciding what way to move the menu (this is called onmouseover, onmouseout or onclick)

********************************************************************************/

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()}

       }

}

/********************************************************************************

Checking if the page is scrolled, if it is move the menu after

********************************************************************************/

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)

}

/********************************************************************************

Inits the page, makes the menu object, moves it to the right place,

show it

********************************************************************************/

function topMenuInit(){

       oMenu=new Array()

       oMenu[0]=new makeMenu('divMenu0',"",tShow,tMove,tSpeed)

       oMenu[1]=new makeMenu('divMenu1',"",tShow,tMove,tSpeed) //*

       //Here's an example of how you can set the properties for each menu: //*

       oMenu[2]=new makeMenu('divMenu2',"",20,10,20) //*

       //You can add as many menus you want like the line above.

       //Just remember to add the actual divs in the style and body as well.

      

       scrolled=bw.ns4||bw.ns6?"window.pageYOffset":"document.body.scrollTop"

       //Placing and showing menus

       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;

}

 

//Initing menu on pageload

onload=topMenuInit;

 

</script>

<div id="divMenu0">

       <!-- You can just replace this text with some cool images if you want -->

       <a href="http://www.7stk.com/">网页特效代码</a><br><br>

       <a href="http://www.7stk.com/">链接二</a><br><br>

       <a href="http://www.7stk.com/">链接三</a><br><br>

       <a href="http://www.7stk.com/">链接四</a><br><br>

       <a href="http://www.7stk.com/" onclick="moveTopMenu(0); return false">网页特效代码</a>

</div>

<div id="divMenu1">

       <!-- You can just replace this text with some cool images if you want -->

       这是第二个菜单的内容<br><br>

       <a href="http://www.7stk.com/" onmouseover="moveTopMenu(1)">网页特效代码</a>

</div>

<div id="divMenu2">

       <!-- You can just replace this text with some cool images if you want -->

       这是第三个菜单的内容<br>

       <a href="#" onclick="moveTopMenu(2); return false">菜单三</a>

</div>

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