// execute only when the whole document is ready
$(document).ready(function() {
	// hide all sub heading lists
	$('#testnav li ul').hide();
	
	// add a click handler to the heading links
	$('#testnav li a').click(function(){
		SetHeightDivMenu();	
		// if the current sub heading list is already open
		if($(this).next('ul:visible').length) {
			// close the sub heading list
			$(this).next('ul:visible').slideUp();
		} else {
			// close all open sub heading lists
			$('#testnav li ul:visible').slideUp();
			// slide open the next list
			$(this).next('ul').slideToggle('normal');
		}	
	// return false to stop link following the href
	return false;
	});
});