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Read form value without submitting

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Sivagami

Programmer
Dec 11, 2000
14
US

Hi, Is there away to read the values in an Input form without Posting it (on a button click) and then assign values to some other fields based on the values inputted, all on client side ?

Thanks,
Shiva.
 
here's some examples

<script>
function declareFlds1(obj) {
document.frm.txt2.value = obj.value;
}
function declareFlds2(obj) {
document.frm.txt2.value = obj;
}
</script>

<form name=&quot;frm&quot;>
onBlur event
<input type=&quot;text&quot; name=&quot;txt1&quot; onBlur=&quot;declareFlds1(this)&quot;>
<input type=&quot;text&quot; name=&quot;txt2&quot;>
or button
<input type=&quot;button&quot; value=&quot;see it&quot; onClick=&quot;declareFlds2(document.frm.txt1.value)&quot;>
</form> ---------------------------------------
{ str = &quot;sleep is good for you. sleep gives you the energy you need to function&quot;;
ptr = /sleep/gi;Nstr = str.replace(ptr,&quot;coffee&quot;);alert(Nstr); }
---------------------------------------
for the best results to your questions: FAQ333-2924

 
Thanks a lot for your instant reply. This is exactly what I had been looking for.

Shiva.
 
Is it possible to do this with dynamic parameters for the function. Since my fields are dynamically generated, like
<%
for i = 1 to 12
for j = 1 to 12 %>
<TD width=35><font face='Arial,Helvetica' size='2'>
<input type=text name=expense_<%=i%>_<%=j%>>
</font></TD>
<%next %>
</TR><TR>
<%next %>

and I do not know how many fields are there or what their names are ??

Shiva.
 
I am presuming you have a dynamically generated form, probably based on a data base query. If that is so than this is how I would go about it.

Step 1. Generate the specific input tags you want to deal with by labelling them with a common class name and a consistent id attribute.

<input type=&quot;Text&quot; id=&quot;#loopcounter#visible&quot; class=&quot;findTheseOnes&quot;>
<input type=&quot;Hidden&quot; id=&quot;hidden#loopcounter#&quot;>

Step 2. Use the tags() function to get a collection of all the input fields on the form.

var bigColletion = document.all.tags(&quot;INPUT&quot;);

Step 3. Use the className property to filter the list down to just the fields you are interested in.

for(i=0; i<bigColletion.length; i++)
{
if(bigCollection.item.className == &quot;findTheseOnes&quot;)
{
//What is the number
tmp = parseInt(bigCollection.item(i).id);

//Perform required manipulations
newvalue = bigCollection.item(i).value + 1;

//Transfer values from visible to hidden
target = eval(&quot;document.all.hidden&quot; + tmp);
target.value = newvalue;
}
}

I am posting a complete working test file below if you want to give it a whirl.

<!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot;>
<html>
<head>
<title>Untitled</title>

<script type=&quot;text/javascript&quot;>
function CheckForm()
{
var bigCollection = document.all.tags(&quot;INPUT&quot;);
for(i=0; i<bigCollection.length; i++)
{
if(bigCollection.item(i).className == &quot;findTheseOnes&quot;)
{
//What is the number
tmp = parseInt(bigCollection.item(i).id);
//Perform required manipulations
newvalue = bigCollection.item(i).value + 1;
//Transfer values from visible to hidden
target = eval(&quot;document.all.hidden&quot; + tmp);
target.value = newvalue;
}
}
}
</script>
</head>

<body>
<form>
<input type=&quot;Text&quot; class=&quot;findTheseOnes&quot; id=&quot;0visible&quot;><input type=&quot;Text&quot; id=&quot;hidden0&quot;><br>
<input type=&quot;Text&quot; class=&quot;findTheseOnes&quot; id=&quot;1visible&quot;><input type=&quot;Text&quot; id=&quot;hidden1&quot;><br>
<input type=&quot;Text&quot; class=&quot;findTheseOnes&quot; id=&quot;2visible&quot;><input type=&quot;Text&quot; id=&quot;hidden2&quot;><br>
<input type=&quot;Button&quot; value=&quot;Submit&quot; onclick=&quot;CheckForm()&quot;>
</form>
</body>
</html>
 
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