function autoResizeTextArea ()
{
	var rgLines = this.value.split('\n');
	var nRows = 1;
	for (var i=0; i<rgLines.length; i++ )
		if (rgLines[i].length > 80)
			nRows += Math.ceil (rgLines[i].length/80);

	nRows += rgLines.length;
	if (nRows > this.rows)
		this.rows = Math.min (nRows, 30);	
}