How to modify hidden value?

Edward King · January 20th, 2006, 10:35 PM

I have a HTML file,there are hidden parameter in in this HTML,hidden parameter name is made of "test"+number,such as
<form name="test" id="test">
<input type="hidden" name="test0" value="9">
<input type="hidden" name="test1" value="5">
<input type="hidden" name="test2" value="6">
<input type="hidden" name="test3" value="1">
</form>

I want to dynamic modify the hidden value,for example
i=3 //the value of i is get dynamic,i=2 or i=3 or any number
test.test<i>.value="99"
I know above sentence is error,how to write it correctly?

Thanks!

vinod_yadav1919 · January 21st, 2006, 01:18 AM

Hii Edward King!!

Use

eval("document.formname.textboxname"+i).value=new_ value
in ur case
eval("document.test.test"+i).value=newvalue
<script>
function setHiddenValue(obj)
{
value1=obj.value
eval("document.test.test"+value1).value=value1;
}
</script>
<form name="test" id="test">
<input type="text" name="test0" value="9">
<input type="text" name="test1" value="5">
<input type="text" name="test2" value="6">
<input type="text" name="test3" value="1">
<select name="val" onchange="setHiddenValue(this)">
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</form>

Change type=text to hidden in ur code
hope this will help you

Cheers :)

vinod

joefawcett · January 21st, 2006, 05:44 AM

In my opinion anyone who uses "eval" for a task like this should be drummed out of the programmers guild.

Code:

function setElementValue(FormName, ElementName, Value)
{
  document.forms[FormName].elements[ElementName].value = Value;
}
//Example
setElementValue("test", "test" + 3, 99);

--

Joe (Microsoft MVP - XML)