function printWindow() {
bV = parseInt(navigator.appVersion);
if (bV >= 4) window.print();
}

function setupDivs(targetElement) {
  if (!document.getElementsByTagName)
    return;
  var myTarget = document.getElementById(targetElement);
  var all_divs = myTarget.getElementsByTagName('div');
  return all_divs;
}

function showClass(targetClass){
	var all_divs = setupDivs('schedule');
	for (var i = 0; i < all_divs.length; i++) {
		var div = all_divs[i]; 
		div.className = ((' ' + div.className + ' ').indexOf(targetClass) != -1) ? div.className : div.className + ' hidden';
//		div.style.background = ((' ' + div.className + ' ').indexOf(targetClass) != -1) ? '#FF9' : '';
	}
}
function showAll(){
	var all_divs = setupDivs('schedule');
	for (var i = 0; i < all_divs.length; i++) {
		var div = all_divs[i]; 
		div.className = div.className.replace(' hidden','');
//		div.style.background = 'none';
	}
}

function classDescription(page) {
		window.open('class_description.php?class_id='+page+'','Descriptions','scrollbars=yes,toolbar=no,status=no,location=0,resizable=yes,close=yes,menubar=no,width=500,height=350');
		return false;
}