//hack to prevent php sessions from timing out on instructor side
//call a php page every few minutes to keep the session alive

function keepAlive(){
	tmp=new Image;
	tmp.src="http://"+document.domain+"/p/onlineEd/courseAdmin.php?apID=0";
	setTimeout("keepAlive()",18*60*1000);//18 minutes
}
if(document.domain=="courses.mindedge.com"){
	keepAlive();
}