function history_explain_html() {
  html = '';
  html = html + '<html>';
  html = html + '<head>';
  html = html + '	<title>Combine Checked Queries Using AND / OR</title>';
  html = html + '        <link rel = STYLESHEET href = "/html/stylesheetmain.css" type = "text/css" title="TAL Online Styles">';
  html = html + '</head>';
  html = html + '<body bgcolor="#ffffff">';
  html = html + '<table width="100%" cellpadding="0" cellspacing="4" border="0">';
  html = html + '<tr><td>&nbsp;</td></tr>';
  html = html + '<tr>';
  html = html + '	<td></td>';
  html = html + '	<td>';
  html = html + '	<!-- Title -->';
  html = html + '	<b><i>Combine Checked Queries Using AND / OR</i></b>';
  html = html + '	<!-- Begin Content  -->';
  html = html + '	';
  html = html + '	<p>The Boolean operators AND and OR can be used to combine previous searches.</p>';
  html = html + '';
  html = html + '	<table>';
  html = html + '	';
  html = html + '		<tr>';
  html = html + '			<td valign="top"><h4>OR</h4></td>';
  html = html + '			<td></td>';
  html = html + '			<td valign="top">';
  html = html + '			<p>The Boolean operator OR combines the checked searches and returns items that contain either search query. This <strong>expands your search</strong>.</p>';
  html = html + '			</td>';
  html = html + '		</tr>';
  html = html + '	</table>';
  html = html + '';
  html = html + '	<!-- End Content -->';
  html = html + '	</td>';
  html = html + '</tr>';
  html = html + '</table>';
  html = html + '</body>';
  html = html + '</html>';
  return html;
}
