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dynamic labels over a chart in gif format

Posted on 1998-11-07
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Last Modified: 2013-12-25
What is the best method & code for displaying text over a Bar chart  (in gif or jpg format) on a web page that is entered by the user.  The gif file stays the same, however the label at the top and bottom of the chart (gif file) change when the user enters the text and presses a submit button. They can then print out the same chart with different titles? code examples? website examples?
 
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Question by:rickwinterkorn
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by:rafistern
ID: 1856161
You can do this in IE4/NS4. Is this good enough?
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by:rafistern
ID: 1856162
For other browsers you would have to use a <input type=text>. This would give you unformatted text.
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Expert Comment

by:cheekycj
ID: 1856163
yup....
using JavaScript and form boxes (around your bar chart) should do the trick

CJ
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Author Comment

by:rickwinterkorn
ID: 1856164
the text will appear "over" a portion of the graphic using your recommendatons? I really need the text to be super-imposed over the text instead of above, below, left, and right. Is this possible by positioning the text in any way?
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rafistern earned 100 total points
ID: 1856165
This should do the trick:

<body>
<img src="graph.gif" width=200 height=200>
<div style="position:relative;top:-180;left:20;z-index:2">
<form>
<input type=text name="title" size=20>
</form>
</div>
</body>

It works like this. The <div> tag wraps the <input> field. it is placed in a layer over the gif using z-index. Its position (top left corner) is set as "relative" to the end of the gif where it appears in the code by -180 pixels up and 20 pixels right.
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by:rafistern
ID: 1856166
This will work in both IE4 and NS4 only.
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Author Comment

by:rickwinterkorn
ID: 1856167
Rafistern, nice job - thanks, works great!  Any easy way to get rid of the borders in the text box?
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Expert Comment

by:rafistern
ID: 1856168
Here is a different and better way to do this:

<body>
<form>
<input type=text name="title" size=20>
<input type=button value="Update" onclick="document.all.t.innerHTML=document.forms[0].title.value">
</form>
<img src="graph.gif" width=200 height=200>
<div id="t" style="font-weight:bold;position:relative;top:-180;left:20;z-index:2">
</div>
</body>

You can put all kinds of formatting into the <div> tag. This is a lot better than the previous version I gave you.
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Author Comment

by:rickwinterkorn
ID: 1856169
Thanks again, this is excellent, works perfect
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