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Showing a textbox with an onchange event

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  #1  
Old May 13th, 2003, 08:13 PM
Arc Arc is offline
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Showing a textbox with an onchange event

Hi, I have a listbox that has 2 values Current Images and New Images. I want to be able to have a textbox show on the page when New Images is selected and have it disapear when the other is selected.

I know this is javascript and i know basically how to do it but i dont know how to get a textbox to show or hide. Here's what i have.
php Code:
Original - php Code 
  1.  
  2. <select name="select" onchange="GetValue(list)">
  3.                   <option selected>Current Images</option>
  4.                   <option>New Images</option>
  5.                 </select></td>
  6.                 <script language="javascript">
  7.                 function GetValue(aList){
  8.                 var ListValue = aList.options[aList.selectedindex].text
  9.                 If (ListValue = "New Image"){
  10.                 <br> show text box
  11.                 }else{
  12.                 hide text box
  13.                 }
  14.                 }
  15.                 </script>
  16.  


Any help is appreciated!
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  #2  
Old May 13th, 2003, 10:35 PM
crisp crisp is offline
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RE: Showing a textbox with an onchange event
suppose we have a textbox, and we put it in a hidden layer:

<div id="theLayer" style="display:none">
<input type="text" name="someTextbox" />
</div>

now, we can use this to show the textbox by making the layer visible:

document.getElementById('theLayer').style.display = 'block';

and this to hide it again:

document.getElementById('theLayer').style.display = 'none';

I could also have used the visibility: hidden/visible option, but that will cause the hidden element to take up space even when it is hidden.
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