AnyLink Vertical Menu--tutorial.jcwcn.com

Directions

Step 1: Insert the following style sheet and script into the <head> section of your page:

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<style type="text/css">

#dropmenudiv{
position:absolute;
background-color: #E3FFB0;
border:1px solid black;
border-bottom-width: 0;
font:normal 12px Verdana;
line-height:18px;
z-index:100;
}

#dropmenudiv a{
width: 100%;
display: block;
text-indent: 3px;
border-bottom: 1px solid black;
padding: 1px 0;
text-decoration: none;
font-weight: bold;
}

#dropmenudiv a:hover{ /*hover background color*/
background-color: #C7FF5E;
}

/* Sample CSS definition for the example list. Remove if desired */
.navlist li {
list-style-type: square;
width: 135px;
background-color: #FFFFB9;
}

</style>


<script type="text/javascript">

/***********************************************
* AnyLink Vertical Menu- © Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

//Contents for menu 1
var menu1=new Array()
menu1[0]='<a href="http://www.javascriptkit.com">JavaScript Kit</a>'
menu1[1]='<a href="http://www.freewarejava.com">Freewarejava.com</a>'
menu1[2]='<a href="http://codingforums.com">Coding Forums</a>'
menu1[3]='<a href="http://www.cssdrive.com">CSS Drive</a>'
menu1[4]='<a href="http://tools.dynamicdrive.com/imageoptimizer/">Image Optimizer</a>'


//Contents for menu 2, and so on
var menu2=new Array()
menu2[0]='<a href="http://www.javascriptkit.com/cutpastejava.shtml">Free JavaScripts</a>'
menu2[1]='<a href="http://www.javascriptkit.com/javaindex.shtml">JavaScript tutorials</a>'
menu2[2]='<a href="http://news.bbc.co.uk">JavaScript Reference</a>'
menu2[4]='<a href="http://www.javascriptkit.com/java/">Java Applets</a>'
menu2[3]='<a href="http://www.javascriptkit.com/dhtmltutors/">DHTML & CSS</a>'
menu2[4]='<a href="http://www.javascriptkit.com/howto/">Design Tutorials</a>'
		
var disappeardelay=250  //menu disappear speed onMouseout (in miliseconds)
var horizontaloffset=2 //horizontal offset of menu from default location. (0-5 is a good value)

/////No further editting needed

var ie4=document.all
var ns6=document.getElementById&&!document.all

if (ie4||ns6)
document.write('<div id="dropmenudiv" style="visibility:hidden;width: 160px" onMouseover="clearhidemenu()" onMouseout="dynamichide(event)"></div>')

function getposOffset(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}


function showhide(obj, e, visible, hidden, menuwidth){
if (ie4||ns6)
dropmenuobj.style.left=dropmenuobj.style.top=-500
dropmenuobj.widthobj=dropmenuobj.style
dropmenuobj.widthobj.width=menuwidth
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
obj.visibility=visible
else if (e.type=="click")
obj.visibility=hidden
}

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function clearbrowseredge(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=ie4 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
if (windowedge-dropmenuobj.x-obj.offsetWidth < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure+obj.offsetWidth
}
else{
var topedge=ie4 && !window.opera? iecompattest().scrollTop : window.pageYOffset
var windowedge=ie4 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure){ //move menu up?
edgeoffset=dropmenuobj.contentmeasure-obj.offsetHeight
if ((dropmenuobj.y-topedge)<dropmenuobj.contentmeasure) //up no good either? (position at top of viewable window then)
edgeoffset=dropmenuobj.y
}
}
return edgeoffset
}

function populatemenu(what){
if (ie4||ns6)
dropmenuobj.innerHTML=what.join("")
}


function dropdownmenu(obj, e, menucontents, menuwidth){
if (window.event) event.cancelBubble=true
else if (e.stopPropagation) e.stopPropagation()
clearhidemenu()
dropmenuobj=document.getElementById? document.getElementById("dropmenudiv") : dropmenudiv
populatemenu(menucontents)

if (ie4||ns6){
showhide(dropmenuobj.style, e, "visible", "hidden", menuwidth)
dropmenuobj.x=getposOffset(obj, "left")
dropmenuobj.y=getposOffset(obj, "top")
dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+obj.offsetWidth+horizontaloffset+"px"
dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+"px"
}

return clickreturnvalue()
}

function clickreturnvalue(){
if (ie4||ns6) return false
else return true
}

function contains_ns6(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}

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

function hidemenu(e){
if (typeof dropmenuobj!="undefined"){
if (ie4||ns6)
dropmenuobj.style.visibility="hidden"
}
}

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

function clearhidemenu(){
if (typeof delayhide!="undefined")
clearTimeout(delayhide)
}

</script>

Step 2: Having done the above, all that's left is setting up your link(s) so a menu drops down. The below sample HTML demonstrates setting up the menu on either a regular text link or a list element (<li>):

The dropdownmenu() function inside the code of Step 2 accepts 4 parameters as shown:

dropdownmenu(this, event, menuarray, 'width')

Only customize the last two parameters (menuarray and 'width'), where:

3) Menuarray- The array contents you wish the menu to display (see code of Step 1).

4) Width- The width of the menu, in pixels.

And that's about it!

Useful Information

As shown in the demo, this script can be associated not just with a regular link (<a>), but also other elements such as a list <li>, a table cell <td> etc. For non regular links, the trick is to make sure the element that will activate the menu has a width defined somewhere. Lets take the example of the list in the demo above:

<ul class="navlist">
<li><a href="#">Dynamic Drive</a></li>
<li onMouseover="dropdownmenu(this, event, menu2, '150px')" onMouseout="delayhidemenu()"><a href="#">JavaScript Kit</a></li>
<li><a href="#">CSS Drive</a></li>
<li><a href="#">Coding Forums</a></li>
</ul>

Here instead of inserting the onMouseover code inside a standard <a> tag, we add it inside a <li> to activate the menu onMouseover. This works, but only if the <li> has a width defined for it, which if you examine the CSS of step 1, you'll see it does:

.navlist li {
width: 135px;
"
"
}

A width needs to be defined either for the <li> (or <ul> instead if you like) in this case, since without it, the menu has no way to know how far to display the menu to the right of the element, and typically will display the menu too far away from the element as a result. So simply remember, when using this script on elements other than a text link, make sure the element has a width defined, either explicitly, by way of an external CSS, or its container.

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AnyLink Vertical Menu

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