// course selector
var ajax = new sack();
function getCourseList(sel)
{
	var type = sel.options[sel.selectedIndex].value;
	document.getElementById('subjectarea').options.length = 0;
	if(type.length>0){
		ajax.requestFile = '/contact-us/getCourses.php?mode='+type;
		ajax.onCompletion = createCourses;
		ajax.runAJAX();
	}
}
		
function createCourses()
{
	var obj = document.getElementById('subjectarea');
	eval(ajax.response);	
}