textarea textfield coutner (on the pageload problem)

[arbitter]

So I have this function from somewhere on the internet, at first it didn't work for a while because I didn't know 'this.form.1' doesn't work but that their needed to be a letter in front of the 1. But that is fixed. Everything works perfectly, the only problem is that the characters don't get counted when the page loads, only when you execute the script (by pressing a button when it's active)

 

Usually you would solve this by doing a body(onload) and load the function, problem is that the function uses 2 parameters and there are multiple textfieldcounters with variable parameters...

 

Here the script anyways:

<script type='text/javascript'>
function textCounter(field, counter) {
var max='140';
if (field.value.length > max)
field.value = field.value.substring(0, max);
else 
counter.value = max - field.value.length;
}
</script>

 

<?php
while($row = mysql_fetch_array($result)){
echo "<form name='form".$row['photoid']."'>";
echo "Afbeelding: " . $row['photoid'] . $row['type'] . "<br />
	<br />
	<textarea onkeydown='textCounter(this.form.a".$row['photoid'].",this.form.counter);' onkeyup='textCounter(this.form.a".$row['photoid'].",this.form.counter);' id='a".$row['photoid']."' name='" . $row['photoid'] . "' >".$row['description']."</textarea><input type='button' onclick=\"update(getElementsByName('".$row['photoid']."')[0].value," . $row['photoid'] . ")\" value='sla op' />";
echo "<div id='".$row['photoid']."'></div>";
echo "<input readonly type='text' name='counter' size='3' maxlength='3' value='140'>";
echo "<hr>";
echo "</form>";
}
?>

 

Thanks in advance!