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()
var linkset=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<d.forms.length;i++) x=d.forms[i][n];
  
        for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  
        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('<layer name=gui bgcolor="#E6E6E6" width="165" onmouseover="clearhidemenu()" onmouseout="hidemenu()">'+which+'</layer>')
                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<menuobj.contentwidth){
                        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<menuobj.contentheight&&mod!=0){
                        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<fo_shadows.length;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
///////////////////////////////////////////////////////////////////////////////////

var menu1="<table border=0 cellspacing=1 cellpadding=1 class=menu>";
menu1+="<tr><td align='left'><a href='http://jsjzx.dzvtc.cn'><font color='#ffffff'>计算机实验教学中心</font></a></td></tr>";
menu1+="<tr><td align='left'><a href='http://dzzx.dzvtc.cn'><font color='#ffffff'>电工电子及自动化实验教学中心</font></a></td></tr>";
menu1+="<tr><td align='left'><a href='http://jxzx.dzvtc.cn'><font color='#ffffff'>机械工程实验教学中心</font></a></td></tr></table>";