Help! javascript - mouseover error

**mlbillman** · Oct 16, 2000, 16:39

On several occasions, I have attempted to create rollovers using JavaScript. When previewed through Dreamweaver (Browsers IE and Netscape), the scripts work great, but when I post them to my server, I get "variables navc and navcover, undefined". Note, I didn't use the Dreamweaver scripting tools; I am trying to create my own code, using several different scripts I found in Javascript manuals. I I can't figure out what is happening after I load it on my server. My host says the server should make no difference because it's a client-side script. Okay so??
Please, some advice.

In the following example, I am using the same original and rollover images for all of my links.

<html>
<head>
<script language="JavaScript">

</head>
<body>

<a href="index.htm" onMouseOver="document.navcenter1.src=navcover.src" onMouseOut="document.navcenter1.src=navc.src" ><img name="navcenter1" src="Images/navcenter.gif" width="52 height="32"></a>

<a href="about.htm" onMouseOver="document.navcenter2.src=navcover.src" onMouseOut="document.navcenter2.src=navc.src"><img name="navcenter2" src="Images/navcenter.gif" width="52" height="32"></a>

and so on...
</body>
</html>

Thanks in advance. This is killing me.

**progbuc** · Oct 16, 2000, 20:27

the if statement isn't necessary and it may be causing the problems. try taking it out.

**Kevin Yank** · Oct 16, 2000, 20:36

There are several problems with your code. Let me suggest reading my article on MouseOvers. It's pretty easy to read and there's lots of sample code for you to use.

Mouseovers Tutorial on Sausage Island

**HotDog** · Oct 17, 2000, 09:43

Try using this simple mouseOver code. It's well documented and very versatile. You can use it to switch any image on your page from any anchored element.

Joe

Code:

<html>
<head>
<!--Scripts by Joe Eliason.  You can use this script freely as long as this comment stays
    intact with the code.  Any questions or comments please email me at papito@yahoo.com.-->
 
<script type="text/javascript" language="javascript">

<!--
//Roll over commands//

	//command for mouseOver
function on_img(loc,img)
{
	loc.src=menuimg[img].src;
}
	//command for mouseOut...Same function as on_img.  Can use one or both functions, works the same.
function off_img(loc,img)
{
	loc.src=menuimg[img].src;
}

//Define and setup image array:   (your variable)menuimg = new Array (2) <-- the number of images in the array
menuimg = new Array(2);

//List your images in the array.//

//FIRST IMAGE  
//The first line (menuimg[0]= new Image (42,499);) defines it as an Image with its width and height
menuimg[0]= new Image (42,499);
//The second line (menuimg[0].src="Images/lineBar0.gif";) defines the image source location
menuimg[0].src="Images/lineBar0.gif";

//SECOND IMAGE
menuimg[1]= new Image (42,499);
menuimg[1].src="Images/lineBar1.gif";

//add more arrays just like above for more images
//-->
</script>
</head>

<body bgcolor="#ffffff" text="#000000" id=all>
<table align="left" border=0 cellpadding=0 cellspacing=0>
	<tr>
		<td rowspan=1 colspan=1 width=183 height=34>
			<!--On the onMouseOver command run the function from the above script...on_img(imageName,Array Number);-->
			<!--Use the [self.status'']command for text in the status bar at the bottom.  Leave blank for no text.-->
			<!--On the onMouseOut command  run the "off_img()" command to return to to the orriginal image.-->
			<a href="directoryIndex.html" onmouseover="on_img(lineBar,1);on_img(directory,10);self.status='Company Directory';return true"onmouseout= "off_img(directory,11);self.status='';return true">
			<!--Give you image a name to be refered by (name="whatever"-->
			<img src="Images\directory1.gif" name="directory" width=183 height=34 border=0></td>
	</tr>

<!--Your image name must be the same as the name you put in the anchor
 tag command [onMouseOut="on_image(imageName,Array Number)] associated
 with the image you want to switch.  If you put a different image name
 in the anchor tag mouseOver command you will switch the image with that
 name.  Play around with it. -->
</table>
</body>
</html>

**mlbillman** · Oct 17, 2000, 13:36

Thanks all for your suggestions. Anxious to try them all. Great tutorial Kevin. Thanks for the code, Joe.

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