function emptyfield(textObj)
	{
		if (textObj.value.length == 0) return true;
		for (var i = 0; i < textObj.value.length; ++i)
		{
			var ch = textObj.value.charAt(i);
			if (ch != " " && ch != "\t") return false;
		}
		return true;
	}

	function checkChars(objValue, maxChars, spanId)
	{
		if (objValue.value.length > maxChars)
		{
			document.getElementById(spanId).innerHTML = 0;
			objValue.value = objValue.value.substring(0, maxChars);
		} else
		{
			document.getElementById(spanId).innerHTML = maxChars - objValue.value.length;
		}
	}