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Source: Internet
Author: User
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<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "textml; Charset=utf-8 "/>
<title> Untitled Document </title>
<style type= "Text/css" >
/* drop-down menu */
/* Single. On behalf of class, #代表id */
/*div11 and div12 in the same position, all in the DIV3 * *
. apDiv11 {
Position:relative;/*position is position, relative is relative position */
Float:left;/*float is floating, this is left-justified */
Length of Width:92px;/*div */
Height of Height:44px;/*div */
The Z-index:1;/*z-index property sets the stacking order of elements. Elements that have a higher stacking order are always in front of elements that are lower in stacking order. */
Background-color: #0F3;/*div background */
Overflow:hidden;/*overflow for out-of-section hidden hidden */
}
. apDiv12 {
position:relative;
Float:left;
width:92px;
height:44px;
Z-index:1;
Background-color: #0F3;
Overflow:visible;/*overflow for the visible sight of the outside part of the eye */
}
/*div2 in DIV11 * *
#apDiv2 {
Absolute position of POSITION:ABSOLUTE;/*DIV2 * *
left:0px;/* the left distance in the div11 from DIV11 */
top:44px;/* distance from above, height of div11 */
Length of Width:127px;/*div2 */
Height of Height:112px;/*div2 */
Z-index:2;
Background-color: #F69; background color of/*DIV2 */
}
#apDiv3 {
Absolute position of POSITION:ABSOLUTE;/*DIV3 * *
left:68px;/* in HTML from the left position */
top:204px;/* the position in the HTML from above */
Length of Width:980px;/*div3 */
Height of Height:48px;/*div3 */
Z-index:2;
}
</style>

<body>

<!--onmouseover for when the mouse is on the Div3, onmouseout is when the mouse leaves the Div3--
<!--display div2--> when the mouse is on div11
<div id= "ApDiv3" >
<div class= "apDiv11" onmouseover "this.classname= ' apDiv12 ';" onmouseout= "This.classname= ' apDiv11 '" >hello< Div id= "ApDiv2" ></div></div>

<div id= "ApDiv1" class= "apDiv11" onmouseover= "this.classname= ' apDiv12 ';" onmouseout= "This.classname= ' apDiv11 '" ><div id= "ApDiv2" ></div></div>

<div id= "ApDiv1" class= "apDiv11" onmouseover= "this.classname= ' apDiv12 ';" onmouseout= "This.classname= ' apDiv11 '" ><div id= "ApDiv2" ></div></div>

</div>
</body>
<ml>

Page drop-down menu

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