function CheckSize(textBoxID, countID, maxSize)
{
var tb = document.getElementById(textBoxID);
var c = document.getElementById(countID);

if(tb == null || c == null)
	return;

var left = maxSize - tb.value.length;
if(left >= 0)
	c.innerHTML = left + " letters left";
else
	c.innerHTML = "Too much text!";
}