File: dropdown.js
// ***** Popup Control *********************************************************
// ***** at_show_aux *****
function at_show_aux(parent, child)
{
var p = document.getElementById(parent);
var c = document.getElementById(child );
var top = (c["at_position"] == "y") ? p.offsetHeight+2 : 0;
var left = (c["at_position"] == "x") ? p.offsetWidth +2 : 0;
for (; p; p = p.offsetParent)
{
top += p.offsetTop;
left += p.offsetLeft;
}
c.style.position = "absolute";
c.style.top = top +'px';
c.style.left = left+'px';
c.style.visibility = "visible";
}
// ***** at_show *****
function at_show()
{
var p = document.getElementById(this["at_parent"]);
var c = document.getElementById(this["at_child" ]);
at_show_aux(p.id, c.id);
clearTimeout(c["at_timeout"]);
}
// ***** at_hide *****
function at_hide()
{
var p = document.getElementById(this["at_parent"]);
var c = document.getElementById(this["at_child" ]);
c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 333);
}
// ***** at_click *****
function at_click()
{
var p = document.getElementById(this["at_parent"]);
var c = document.getElementById(this["at_child" ]);
if (c.style.visibility != "visible") at_show_aux(p.id, c.id); else c.style.visibility = "hidden";
return false;
}
// ***** at_attach *****
// PARAMETERS:
// parent - id of the parent html element
// child - id of the child html element that should be droped down
// showtype - "click" = drop down child html element on mouse click
// "hover" = drop down child html element on mouse over
// position - "x" = display the child html element to the right
// "y" = display the child html element below
// cursor - omit to use default cursor or specify CSS cursor name
function at_attach(parent, child, showtype, position, cursor)
{
var p = document.getElementById(parent);
var c = document.getElementById(child);
p["at_parent"] = p.id;
c["at_parent"] = p.id;
p["at_child"] = c.id;
c["at_child"] = c.id;
p["at_position"] = position;
c["at_position"] = position;
c.style.position = "absolute";
c.style.visibility = "hidden";
if (cursor != undefined) p.style.cursor = cursor;
switch (showtype)
{
case "click":
p.onclick = at_click;
p.onmouseout = at_hide;
c.onmouseover = at_show;
c.onmouseout = at_hide;
break;
case "hover":
p.onmouseover = at_show;
p.onmouseout = at_hide;
c.onmouseover = at_show;
c.onmouseout = at_hide;
break;
}
}
File: sample.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Dropdown Sample</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="description" content="" />
<meta name="keywords" content="" />
<script type="text/javascript" src="dropdown.js"></script>
<style type="text/css">
body { font-size: 0.7em; }
h3 { font-size: 1.6em; margin: 0px; }
a.sample_attach, a.sample_attach:visited, div.sample_attach
{
display: block;
width: 100px;
border: 1px solid black;
padding: 2px 5px;
background: #FFFFEE;
text-decoration: none;
font-family: Verdana, Sans-Sherif;
font-weight: 900;
font-size: 1.0em;
color: #008000;
}
a.sample_attach, a.sample_attach:visited { border-bottom: none; }
div#sample_attach_menu_child { border-bottom: 1px solid black; }
form.sample_attach
{
position: absolute;
visibility: hidden;
border: 1px solid black;
padding: 0px 5px 2px 5px;
background: #FFFFEE;
}
form.sample_attach b
{
font-family: Verdana, Sans-Sherif;
font-weight: 900;
font-size: 1.1em;
}
input.sample_attach { margin: 1px 0px; width: 170px; }
</style>
</head>
<body>
<div>
<h3>Dropdown Sample</h3>
<!-- ***** Dropdown Menu *************************************************** -->
<br /><br />
<div id="sample_attach_menu_parent" class="sample_attach">Main Menu</div>
<div id="sample_attach_menu_child">
<a class="sample_attach" href="javascript:alert('Item 1');">Item 1</a>
<a class="sample_attach" href="javascript:alert('Item 2');">Item 2</a>
<a class="sample_attach" href="javascript:alert('Item 3');">Item 3</a>
</div>
<script type="text/javascript">
at_attach("sample_attach_menu_parent", "sample_attach_menu_child", "hover", "y", "pointer");
</script>
<!-- ***** Search Form ***************************************************** -->
<br /><br /><br /><br /><br />
<div class="sample_attach" id="sample_attach_src_parent">Site Search</div>
<form class="sample_attach" id="sample_attach_src_child" action="sample.html">
<div>
<b>Enter search terms:</b><br />
<input class="sample_attach" type="text" name="terms" /><br />
<input type="submit" value="Submit" />
</div>
</form>
<script type="text/javascript">
at_attach("sample_attach_src_parent", "sample_attach_src_child", "click", "x", "pointer");
</script>
</div>
</body>
</html>
Read More - Drop down Menu and Drop down Search Box
