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The primary user of this application has requested that I insert some default information into these text fields indicating the date they were last edited. The process of inserting text into a text form field with Javascript is very simple, but I first need a way to "count" the text fields on the screen to determine how many times I need to loop through the update process. Luckily, the fields have a regular naming convention, but I've never before tried to count the form fields on a page through javascript and don't know where to start.
The naming convention for the form fields is:
id ="Table#Grp:LIST.VAR2#row#1#col#2"
id ="Table#Grp:LIST.VAR2#row#2#col#2"
id ="Table#Grp:LIST.VAR2#row#3#col#2"
id ="Table#Grp:LIST.VAR2#row#4#col#2"
etcetera....
Note: I have absolutely no access to the code running in the application server, so there's no way I can just pass this information to the screen (that would be too easy). The server is generating this HTML page, and I need to figure out how to count and prepopulate these fields entirely on the client side using only Javascript.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Untitled</title>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">
<script language="JavaScript" type="text/javascript">
<!--
function giveIns(){
var el_no=document.forms[0].elements.length;
alert(el_no);
}
//-->
</script>
</head>
<body onload="giveIns();">
<form>
<input type="text" size="30" />
<input type="text" size="30" />
<input type="text" size="30" />
</form>
</body>
</html>
Note that forms[].elements counts all the elements in a form, so you may have to make adjustments if there are additional elements within the form besides the ones you wish to enumerate. forms[].elements is an array itself, so that the first input field in this example could have a value of "text" assigned to it by:
document.forms[0].elements[0].value = "text"
Alternatively you could use document.getElementsByTagName("input") to return an array of just the input tags, but again all input tag types would be counted.
