function counterUpdate(opt_countedTextBox, opt_countBody, opt_maxSize) 
{
	var countedTextBox = opt_countedTextBox ? opt_countedTextBox : "counttxt";
	var countBody = opt_countBody ? opt_countBody : "countBody";
	var maxSize = opt_maxSize ? opt_maxSize : 1024;

	var field = document.getElementById(countedTextBox);

	if (field && field.value.length >= maxSize) 
	{
		field.value = field.value.substring(0, maxSize);
	}
	var txtField = document.getElementById(countBody);
	if (txtField) 
	{ 
		txtField.innerHTML = opt_maxSize - field.value.length + " chars remaining" ;
	}
}