Menu list shown when mouseover event is triggered

Dear experts,

Most of the websites show dropdown list of menu when mouse is moved over its main menu. For example, in Microsoft homepage(http://www.microsoft.com/), when your mouse is moved over Subscribe menu, the dropdown list consists of Newsletters and Software will appear. I want to know how to make the item list to show upwards as my menu bar is located at the bottom of the homepage. Please advise.

Thank you very much!




hllimAsked:
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sybeCommented:
Well MS has a lot of code there, but basically the menu list is a <div> with style.display='none' and a high z-index (so it appears on top of other divs).

There is a onmouseover which sets the display of the div to 'block' (so it becomes visible), and an onmouseout which sets the display to 'none' again.

To show the div show upwards, all you need to do is position the div on the place you want it.


0
JoaTexCommented:
Hi
See if This can Suites You.

<HTML>

<HEAD>
<TITLE></TITLE>
<META NAME="GENERATOR" CONTENT="CutePage 2.0">
<style>


.menuskin{
position:absolute;
width:165px;
background-color:menu;
border:2px solid black;
font:normal 12px Verdana;
line-height:18px;
z-index:100;
visibility:hidden;
}

.menuskin a{
text-decoration:none;
color:black;
padding-left:10px;
padding-right:10px;
}

#mouseoverstyle{
background-color:highlight;
}

#mouseoverstyle a{
color:white;
}

</style>

<script language="JavaScript1.2">



var linkset=new Array()


linkset[0]='<div class="menuitems"><a href="http://dynamicdrive.com">Dynamic Drive</a></div>'
linkset[0]+='<div class="menuitems"><a href="http://javascriptkit.com">JavaScript Kit</a></div>'
linkset[0]+='<div class="menuitems"><a href="http://freewarejava.com">Freewarejava</a></div>'

linkset[1]='<div class="menuitems"><a href="http://msnbc.com">MSNBC</a></div>'
linkset[1]+='<div class="menuitems"><a href="http://cnn.com">CNN</a></div>'
linkset[1]+='<div class="menuitems"><a href="http://abcnews.com">ABC News</a></div>'
linkset[1]+='<div class="menuitems"><a href="http://www.washingtonpost.com">Washington Post</a></div>'



var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1
var ns6=document.getElementById&&!document.all
var ns4=document.layers

function showmenu(e,which){

if (!document.all&&!document.getElementById&&!document.layers)
return

clearhidemenu()

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

//Find out how close the mouse is to the corner of the window
var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX
var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY

//if the horizontal distance isn't enough to accomodate the width of the context menu
if (rightedge<menuobj.contentwidth)
//move the horizontal position of the menu to the left by it's width
menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX-menuobj.contentwidth : ns6? window.pageXOffset+eventX-menuobj.contentwidth : eventX-menuobj.contentwidth
else
//position the horizontal position of the menu where the mouse was clicked
menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX : ns6? window.pageXOffset+eventX : eventX

//same concept with the vertical position
if (bottomedge<menuobj.contentheight)
menuobj.thestyle.top=ie4? document.body.scrollTop+eventY-menuobj.contentheight : ns6? window.pageYOffset+eventY-menuobj.contentheight : eventY-menuobj.contentheight
else
menuobj.thestyle.top=ie4? document.body.scrollTop+event.clientY : ns6? window.pageYOffset+eventY : eventY
menuobj.thestyle.visibility="visible"
return false
}

function contains_ns6(a, b) {
//Determines if 1 element in contained in another- by Brainjar.com
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}

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

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

</script>
</HEAD>

<BODY>
<div onmouseover="clearhidemenu();highlightmenu(event,'on')" class="menuskin" onmouseout="highlightmenu(event,'off');dynamichide(event)" id="popmenu">
</div>

<a onmouseover="showmenu(event,linkset[0])" href="#" onmouseout="delayhidemenu()">Webmaster Links</a>&nbsp;&nbsp
<a onmouseover="showmenu(event,linkset[1])" href="#" onmouseout="delayhidemenu()">News sites</a>

</BODY>
</HTML>
Jo
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AmericanDogmaCommented:
I recomend using the highly custimizable, and completely cross browser menu listed here.

http://www.dhtmlcentral.com/projects/coolmenus/?m=10

This menu script has the functionailty you desire and has been tested indepth by countless individuals
0
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Programming_GalCommented:
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I will leave a recommendation in the Cleanup topic area that this question is:

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