function checkLength(idInput, idMsg, maxLength)
{
	var ta = idInput;
	var mc = document.getElementById(idMsg);
	var l = maxLength - ta.value.length;
	
	mc.innerHTML = l;
	
	if (l >= 0) {
		mc.style.color = "#000000";
	} else {
		ta.value = ta.value.substring(0, maxLength);
		mc.style.color = "#FF0000";
	}
}