Imitation DVBBS drop-down menu effect jb51 corrected without error

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Imitation DVBBS drop-down menu effect jb51 corrected without error_drop-down menu

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May 16, 2016 pm 07:27 PM

1、将存为menu.htm格式文件以下为代码内容：

复制代码代码如下:

网络文摘

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2、将下面代码存为menu.js文件，并与menu.htm放到同级目录下

复制代码代码如下:

//Pop-it menu- By Dynamic Drive - Modified by Wbird 
//For full source code and more DHTML scripts, visit http://www.gyct.cn 
//This credit MUST stay intact for use 
var menuOffX=0 //菜单距连接文字最左端距离 
var menuOffY=18 //菜单距连接文字顶端距离 
var vBobjects = new Array(); 
var fo_shadows=new Array(); 
////No need to edit beyond here 
var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1 
var ns6=document.getElementById&&!document.all 
var ns4=document.layers 

function MM_findObj(n, d) { 
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) { 
d=parent.frames[n.substring(p 1)].document; n=n.substring(0,p);} 

if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i
for(i=0;!x&&d.layers&&i
if(!x && d.getElementById) x=d.getElementById(n); return x; 

}  

function fetch_object(idname, forcefetch) 
{ 
if (typeof(vBobjects[idname]) == "undefined") 
{ 
vBobjects[idname] = MM_findObj(idname); 
} 
return vBobjects[idname]; 
} 
//showmenu vmenu:内容，允许为空,vmenuobj DIV数据ID，MOD 0=关闭浏览器自适应，用于版面导航菜单 
function showmenu(e,vmenu,vmenuobj,mod){ 
    if (!document.all&&!document.getElementById&&!document.layers) 
        return 
    var which=vmenu; 
    if (vmenuobj) 
    { 
        var MenuObj = fetch_object(vmenuobj); 
        if (MenuObj) 
        { 
            which = MenuObj.innerHTML; 
        } 
    } 
    if (!which) 
    { 
        return 
    } 
    clearhidemenu(); 
    ie_clearshadow(); 
    menuobj=ie4? document.all.popmenu : ns6? document.getElementById("popmenu") : ns4? document.popmenu : "" 
    menuobj.thestyle=(ie4||ns6)? menuobj.style : menuobj 
    if (ie4||ns6) 
        menuobj.innerHTML=which 
    else{ 
        menuobj.document.write('' which '') 
        menuobj.document.close() 
    } 
    menuobj.contentwidth=(ie4||ns6)? menuobj.offsetWidth : menuobj.document.gui.document.width 
    menuobj.contentheight=(ie4||ns6)? menuobj.offsetHeight : menuobj.document.gui.document.height 
    eventX=ie4? event.clientX : ns6? e.clientX : e.x 
    eventY=ie4? event.clientY : ns6? e.clientY : e.y 
    var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX 
    var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY 
    var getlength 
        if (rightedge            getlength=ie4? document.body.scrollLeft eventX-menuobj.contentwidth menuOffX : ns6? window.pageXOffset eventX-menuobj.contentwidth : eventX-menuobj.contentwidth 
        }else{ 
            getlength=ie4? ie_x(event.srcElement) menuOffX : ns6? window.pageXOffset eventX : eventX 
        }
        menuobj.thestyle.left=getlength 'px' 
        if (bottomedge            getlength=ie4? document.body.scrollTop eventY-menuobj.contentheight-event.offsetY menuOffY-23 : ns6? window.pageYOffset eventY-menuobj.contentheight-10 : eventY-menuobj.contentheight 
        }    else{ 
            getlength=ie4? ie_y(event.srcElement) menuOffY : ns6? window.pageYOffset eventY 10 : eventY 
        } 
    menuobj.thestyle.top=getlength 'px' 
    menuobj.thestyle.visibility="visible" 
    ie_dropshadow(menuobj,"#999999",3) 
    return false 
} 

function ie_y(e){   
    var t=e.offsetTop;   
    while(e=e.offsetParent){   
        t =e.offsetTop;   
    }   
    return t;   
}   
function ie_x(e){   
    var l=e.offsetLeft;   
    while(e=e.offsetParent){   
        l =e.offsetLeft;   
    }   
    return l;   
}   
function ie_dropshadow(el, color, size) 
{ 
    var i; 
    for (i=size; i>0; i--) 
    { 
        var rect = document.createElement('div'); 
        var rs = rect.style 
        rs.position = 'absolute'; 
        rs.left = (el.style.posLeft   i)   'px'; 
        rs.top = (el.style.posTop   i)   'px'; 
        rs.width = el.offsetWidth   'px'; 
        rs.height = el.offsetHeight   'px'; 
        rs.zIndex = el.style.zIndex - i; 
        rs.backgroundColor = color; 
        var opacity = 1 - i / (i   1); 
        rs.filter = 'alpha(opacity='   (100 * opacity)   ')'; 
        //el.insertAdjacentElement('afterEnd', rect); 
        fo_shadows[fo_shadows.length] = rect; 
    } 
} 
function ie_clearshadow() 
{ 
    for(var i=0;i    { 
        if (fo_shadows[i]) 
            fo_shadows[i].style.display="none" 
    } 
    fo_shadows=new Array(); 
} 
function contains_ns6(a, b) { 
    while (b.parentNode) 
        if ((b = b.parentNode) == a) 
            return true; 
    return false; 
} 

function hidemenu(){ 
    if (window.menuobj) 
        menuobj.thestyle.visibility=(ie4||ns6)? "hidden" : "hide" 
    ie_clearshadow() 
} 

function dynamichide(e){ 
    if (ie4&&!menuobj.contains(e.toElement)) 
        hidemenu() 
    else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget)) 
        hidemenu() 
}

function delayhidemenu(){ 
    if (ie4||ns6||ns4) 
        delayhide=setTimeout("hidemenu()",500) 
} 

function clearhidemenu(){ 
    if (window.delayhide) 
        clearTimeout(delayhide) 
} 
function highlightmenu(e,state){ 
    if (document.all) 
        source_el=event.srcElement 
    else if (document.getElementById) 
        source_el=e.target 
    if (source_el.className=="menuitems"){ 
        source_el.id=(state=="on")? "mouseoverstyle" : "" 
    } 
    else{ 
        while(source_el.id!="popmenu"){ 
            source_el=document.getElementById? source_el.parentNode : source_el.parentElement 
            if (source_el.className=="menuitems"){ 
                source_el.id=(state=="on")? "mouseoverstyle" : "" 
            } 
        } 
    } 
} 

if (ie4||ns6) 
document.onclick=hidemenu

3、在menu.htm目录下建立image目录，制作背景图片
PS:事例效果:
以下为代码内容：

简约时尚
魔兽世界
清除记录
','site_menu')">[选择皮肤]
jb51修正无错

[Ctrl A 全选注:如需引入外部Js需刷新才能执行

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