// use this on links to prevent dotted border on certain browsers

function defocus() {
	if (document.all || document.getElementById) 
		this.blur(); 
	return true;
}

function isNotEmpty(elem) {
	var str = elem.value;

	if ((str == null) || (str == '')) {
		return false;
	}
	else {
		return true;
	}
}

function isLengthX(elem, required_length) {
    //var required_length;
	var str = elem.value;
	if (str.length == required_length) {
		return true;
	}
	else {
		return false;
	}
}

function isNumeric(elem) {
	var str = elem.value;
	
	if (isNaN(parseFloat(str))) {
		return false;
	}
	return true
}



// a recursive jQuery function that crossfades between all
// images belonging to <div id="header_slideshow">
// i = index of photo to start with
// 
// images should all be assigned as position:absolute; top: 0; left: 0;
// image to be shown initially (same as image that i indexes) should
// be set to display:block; all other images should be set to display:none

function image_xfader(i) {
	
	var fade_in_time = 2000;
	var fade_delay = 5000;
	var fade_out_time = 2000;
	var img_selector = "#header_slideshow img";
	
	var num_images = $(img_selector).length;
	
	$(img_selector + ":eq(" + i + ")").fadeIn(fade_in_time).fadeTo(fade_delay,1,function(){
		if ((i+1) == num_images) {
			image_xfader(0);
		}
		else {
			image_xfader(i + 1);
		}
	}).fadeOut(fade_out_time);
}


// handler function for FAQ page

function show_faq(event) {
	// this is the id for the <div> that
	// we want to show
	show_id = '#' + event.attr("class");
	
	// turn off active states for all links first	
	$('#faq_links li a').removeClass('faq_on');
	
	// then turn on active state for current link
	event.addClass('faq_on');
	
	// hide all other FAQ <div>s except the 
	// current one
	$('#faq_content div').hide(1, function () { 
		$(show_id).show();
		$(show_id + ' div').show(); 
	});

	return false;
}

function cancel_menu() {
	$('ul#nav_header li#mn_soups_and_chowders ul').css('display', 'none');
}

// start the jQuery slideshow
// and other jQuery events
// after document has loaded

$(document).ready(function(){
  // start slideshow
  image_xfader(0);
  // remove dotted boxes from links on focus
  // this causes problems with Windows browsers...
  //$('a').bind("click", function () { defocus(); });
  
  
  // simple dropdown timer
  var timer_id;
			
	$('li#mn_soups_and_chowders').hover(
		function() {
		 	$('ul#nav_header li#mn_soups_and_chowders ul').css('display', 'block');
		 	timer_id = setTimeout('cancel_menu()', 4000);
		}, 
		function() {
		}
	);
	
	$('li#mn_brokers').hover(
		function() {
		 	$('ul#nav_header li#mn_brokers ul').css('display', 'block');
		 	timer_id = setTimeout('cancel_menu()', 4000);
		}, 
		function() {
		}
	);
});