function loadCalender(showyear,showmonth)
{ 
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

var showyear=showyear;
var showmonth=showmonth;

url="smcalendar.php"
url=url+"?showyear="+showyear+"&showmonth="+showmonth;

xmlhttp.open("GET",url,false);
xmlhttp.send(null);
document.getElementById('smcalendar').innerHTML=xmlhttp.responseText;
}