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problems using Javascript with CDML

Michael Lally

By Michael Lally
in Other Internet Technologies

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Michael Lally

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I want to limit the number of characters a user can enter into a text area on a form. before i put any scripts on my form when the user edits the fields and clicks update, everything works well and the db fields are updated. However once i put the javascript to limit the number of characters in my textarea and then submit the form i get an "unknown error number 102". I know filemaker says this error is about incorrect links or field names but not in this case. Below is the javascript that i have used:

<head>

<script language="javascript" type="text/javascript">

function limitText(limitField, limitCount, limitNum){

if (limitField.value.length > limitNum){

limitField.value = limitField.value.substring(0,limitNum);

}else {

limitCount.value = limitNum - limitField.value.length;

}

}

</script>

</head>

<body>

<table>

<tr>

<td class="style1"><div align="right">Contents</div></td>

<td><textarea name="limitedtextarea" onKeyDown="limitText(this.form.limitedtextarea,this.form.countdown,100);" onKeyUp="limitText(this.form.limitedtextarea,this.form.countdown,100);">[FMP-field:drivingsection]</textarea><br>

<font size="1">(Maximum characters: 100)<br>You have <input readonly type="text" name="countdown" size="3" value"100"> characters left.</font></td>

</tr>

Once i put this javascript in the textarea tag i get the error. Has anyone come across this before? Or know of another way i can limit a textarea....the ultimate goal is to limit it to a certain amount of characters based on contents of another field. I have just started with limiting it to 100 characters to test if it would work. Unfortunetly, it doesnt.

Any help much appreciated....

Garry Claridge Grand Master

Garry Claridge

Posted
Posted

This is one that I use:

<tr><td>Establishment Description:<br>(Limited to 350 characters, approx 60 words)</td>

		<td colspan="2"><textarea name="estab_desc" cols="38" rows="4"><?php echo  $estab_desc ?></textarea></td></tr>


And the Javascript in the <head>

<script>

		function validate()

			{

			with (document.estabfm)

				{

				var subOK = true;

				sEstab_Desc = estab_desc.value;

				if (sEstab_Desc.length > 350)

						{ 

						subOK = false;

						alert ("The Description is " + estab_desc.value.length + " characters longnPlease shorten!!!");

						};

						

				if (subOK) { submit(); };

				};

			};

</script>

I use this in the <form> tag:

onsubmit="validate();return false;">

Remember that this:

name="limitedtextarea"

must be a name of one of the fields in your database.

Garry

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