I use the CSS smart image enlarger example in my web application.
Everything is good, but when image popup on the top of my web page,
I can see the texts on my web page from Image. That is, the background of (popup) image becomes transparent. Even I set the background color as black.

My work environment
IE 7 and Visual studio 2005 ( axp.net 2.0)

CSS:

<style type="text/css">

/*Credits: Dynamic Drive CSS Library */
/*URL: http://www.dynamicdrive.com/style/ */

/* smart image enlarger starts here */
/* If your images are not linking to other pages leave the links as <a href="#nogo"> Otherwise enlarger won't work in IE6 */

.ienlarger {
float: left;
clear: none; /* set to left or right if needed */
padding-bottom: 5px; /* space between thumbs. Don't change this to margin */
padding-right: 5px; /* space between thumbs and wrapping text when there is any text around it */
}

.ienlarger a {
display:block;
text-decoration: none;
/* add cursor:default; to this rule to disable the hand cursor */
}

.ienlarger a:hover{ /* don't move this positioning to normal state */
position:relative;
}

.ienlarger span img {
border: 1px solid #FFFFFF; /* adds a border around the image */
margin-bottom: 8px; /* pushes the text down from the image */
}

.ienlarger a span { /* this is for the large image and the caption */
position: absolute;
display:none;
color: #FFCC00; /* caption text colour */
text-decoration: none;
font-family: Arial, Helvetica, sans-serif;
font-size: 13px; /* caption text size */
background-color: #000000;
font-weight: bold;
padding-top: 10px;
padding-right: 10px;
padding-bottom: 13px;
padding-left: 10px;
}

.ienlarger img { /* leave or IE puts a border around links */
border-width: 0;
}

.ienlarger a:hover span {
display:block;
top: 50px; /* means the pop-up's top is 50px away from thumb's top */
left: 90px; /* means the pop-up's left is 90px far from the thumb's left */
z-index: 100;

/* If you want the pop-up open to the left of thumb, remove the left: 90px; and add
right: 90px; This would mean the right side of the pop-up is 90px far from the right side of thumb */

/* If you want the pop-up open above the thumb, remove the top: 50px; and add
bottom: 50px; This would mean the bottom of the pop-up is 50px far from the bottom of thumb */

/* add cursor:default; to this rule to disable the hand cursor only for the large image */
}

.resize_thumb {
width: 150px; /* enter desired thumb width here */
height : auto;
}

/* smart image enlarger ends here */

</style>




.ASPX:

<div class="ienlarger"><a href="#nogo"/>
<img src="Images/Home1.gif" alt="thumb" class="resize_thumb" />
<span>
<img src="Images/minolmap.GIF" alt="large" /><br />