function showdiv(id) {
	//safe function to show an element with a specified id
		  
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'block';
		}
		else { // IE 4
			document.all.id.style.display = 'block';
		}
	}
}
function requireTerm(){
	if(document.class_search.term.selectedIndex==0){
		alert("Please select a Term.");
		return false;
	}
	return true;
}

function updateCourseLevel(obj){
	var sel=obj.selectedIndex;
	if(sel==0){
		
	}
	else if (sel==10){
		obj.form.course_level_2.selectedIndex=0;	
	}
	else{
		obj.form.course_level_2.selectedIndex=sel+1;
		
	}	
}

function updateStopTimes(obj){
	var sel=obj.selectedIndex;
	if(sel==0){
		
	}
	else if (sel==35){
		obj.form.stop_time.selectedIndex=0;	
	}
	else{
		obj.form.stop_time.selectedIndex=sel+1;		
	}
	
}