<!--
function writeMenu(){
var str='';
str+='		<li><a id="link1" href="#" onclick="document.getElementById(\'intro1\').style.display=\'\';document.getElementById(\'intro2\').style.display=\'none\';document.getElementById(\'intro3\').style.display=\'none\'; document.getElementById(\'intro4\').style.display=\'none\';document.getElementById(\'link1\').className=\'on\';document.getElementById(\'link2\').className=\'test\';document.getElementById(\'link3\').className=\'test\'; document.getElementById(\'link4\').className=\'test\';return false" class="on">Heating &amp; Cooling<\/a><\/li>';
str+='			   ';
str+='		<li><a id="link2" href="#" onclick="document.getElementById(\'intro2\').style.display=\'\';document.getElementById(\'intro1\').style.display=\'none\';document.getElementById(\'intro3\').style.display=\'none\'; document.getElementById(\'intro4\').style.display=\'none\';document.getElementById(\'link2\').className=\'on\';document.getElementById(\'link1\').className=\'test\';document.getElementById(\'link3\').className=\'test\'; document.getElementById(\'link4\').className=\'test\';return false">Radiant Flooring<\/a><\/li>';
str+='		   ';
str+='		<li><a id="link3" href="#" onclick="document.getElementById(\'intro3\').style.display=\'\';document.getElementById(\'intro1\').style.display=\'none\';document.getElementById(\'intro2\').style.display=\'none\';document.getElementById(\'intro4\').style.display=\'none\';document.getElementById(\'link3\').className=\'on\';document.getElementById(\'link1\').className=\'test\';document.getElementById(\'link2\').className=\'test\'; document.getElementById(\'link4\').className=\'test\';return false">Ventilation<\/a><\/li>';
str+='			   ';

str+='		<li><a id="link4" href="#" onclick="document.getElementById(\'intro4\').style.display=\'\';document.getElementById(\'intro1\').style.display=\'none\';document.getElementById(\'intro2\').style.display=\'none\'; document.getElementById(\'intro3\').style.display=\'none\';document.getElementById(\'link4\').className=\'on\';document.getElementById(\'link1\').className=\'test\'; document.getElementById(\'link3\').className=\'test\';document.getElementById(\'link2\').className=\'test\';return false">Boilers<\/a><\/li>';
str+='			   ';

document.write(str);
}
//-->
