var n=1;

function addLine()
{
	lcont    = document.getElementById('lineCont');
	
	html = '<table border="0" width="100%" cellpadding="0" cellspacing="0">'+
		   '    <tr align="left" valign="middle">'+
		   '	    <td width="85"><input type="text" name="revcode'+n+'" value="" class="input" style="width:77px" /></td>'+
		   '		<td width="85"><input type="text" name="ctpcode'+n+'" value="" class="input" style="width:77px" /></td>'+
		   '		<td width="85"><input type="text" name="modifier'+n+'" value="" class="input" style="width:77px" /></td>'+
		   '		<td width="85"><input type="text" name="units'+n+'" value="" class="input" style="width:77px" /></td>'+
		   '		<td><input type="text" name="billed_amount'+n+'" value="" class="input" style="width:77px" /></td>'+
		   '	</tr>'+
		   '<tr><td colspan="5" height="5"></td></tr>'+
		   '</table>';
	
	_ins = lcont.childNodes[0];
	
	if(_ins.nodeName == '#text')
	{
		_ins = _ins.nextSibling;
	}
	
	_ins.innerHTML = _ins.innerHTML + html;
	
	lcont.style.display    = '';
	
	n++;
}