function school_ajax_js()
	{
		var school_dropdown = document.getElementById('id_top_right_school_dropdown');
		var school_id = school_dropdown.options[school_dropdown.selectedIndex].value;
		
		var url_str = '/schools/set_school_session/'+school_id;
		
		new Ajax.Updater('top_right_school', url_str, {
		evalScripts: true,
		asynchronous: true
		});
	}
	
	function subject_ajax_js()
	{
		var subject_dropdown = document.getElementById('subject_dropdown');
		var subject_id = subject_dropdown.options[subject_dropdown.selectedIndex].value;
		
		var url_str = '/notes/get_class_dropdown/'+subject_id;
		
		new Ajax.Updater('dropdowns', url_str, {
		evalScripts: true,
		asynchronous: true
		});
	}
	

	function add_subject_ajax_js()
	{
		var subject_dropdown = document.getElementById('subject_dropdown');
		var subject_id = subject_dropdown.options[subject_dropdown.selectedIndex].value;
		
		var url_str = '/notes/get_add_class_dropdown/'+subject_id;
		
		new Ajax.Updater('dropdowns', url_str, {
		evalScripts: true,
		asynchronous: true
		});
	}


	function class_ajax_js()
	{
		var class_dropdown = document.getElementById('class_dropdown');
		var class_id = class_dropdown.options[class_dropdown.selectedIndex].value;
		
		var url_str = '/notes/get_section_dropdown/'+class_id;
		
		new Ajax.Updater('dropdowns', url_str, {
		evalScripts: true,
		asynchronous: true
		});
	}


	function add_class_ajax_js()
	{
		var class_dropdown = document.getElementById('class_dropdown');
		var class_id = class_dropdown.options[class_dropdown.selectedIndex].value;
		
		var url_str = '/notes/get_add_section_dropdown/'+class_id;
		
		new Ajax.Updater('dropdowns', url_str, {
		evalScripts: true,
		asynchronous: true
		});
	}