$(function() {
  $("#dob").datepicker(
    {
      minDate: new Date(1900,1-1,1), maxDate: '-18Y',
      dateFormat: 'dd/mm/yy',
      defaultDate: new Date(1970,1-1,1),
      changeMonth: true,
      changeYear: true,
      yearRange: '-110:-18'
    }
  );					
});

 
/*
 * printform 1.0
 * By John Elliott (http://www.flipflops.org)
 * Copyright (c) 2008 John Elliott
 * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
*/
 
/**
 * convert textareas and select tags to divs so that you HTML forms can be printed.
 *
 *
 *
 * @name printform
 * @type jQuery
 * @author John Elliott (http://www.flipflops.org)
 * @desc 
 * 
 * @example $('#tester').printform();
 * @desc call the plugin on #tester - any select or textareas will be replaced
 *
 * @param settings - not used, but included for future proofing! (I'm sure there will be options sometime...)
 *
*/
 
jQuery.fn.printform = function(settings){
	return this.each(function(){
		new jQuery.printform(this, settings);
	});
}
 
 
 
jQuery.printform = function(obj, settings) {
 
  	/*
  	* within a parent object - replace the textareas and select menus
  	*/
 
 
 	init(obj, 'textarea');
	init(obj, 'select');	
 
 
	function init(obj, fieldType) {
 
	/*
	* loop through each instance of an element within the parent 
	*/
 
		obj = jQuery(obj).attr('id');
 
		jQuery('#' + obj + ' ' + fieldType).each( function() {
 
			var id = jQuery(this).attr('id');
 
			field_replacer(id, fieldType);
		});
	}		
 
 
	function field_replacer(id, fieldType) {
 
	/*
	* function to replace the elements with divs
	*/
 
			str = jQuery('#' + id).val();
			str = str.replace(/\n/g, '<br />');
 
			if ( jQuery('#replace-' + id).length > 0 ) {
				// if a replacement div already exists for this element, then just show it.
				// update the content of the replacer with the edited content
				jQuery('#replace-' + id).html(str).show();			
			} else {
				// otherwise create a new replacement div for the element
				jQuery('#' + id).after('<div class="' + fieldType + '-replace" id="replace-' + id + '">' + str + '</div>');			
			}
 
			jQuery('#' + id).hide(); // hide the element that has just been replaced
			field_watcher(id, fieldType); // add event listeners
	}											
 
	function field_watcher(id,  fieldType) {
 
	/*
	* add listeners to the elements
	* onclick - show the original element and hide the replacer
	* onblur - call the field_replacer to update the page
	*/
 
		jQuery('#replace-' + id).click(function() {
 
		jQuery('#' + id).show().focus();
		jQuery('#replace-' + id).hide();
 
		jQuery('#' + id).blur(function() {
 
			field_replacer(id,  fieldType);								
 
		});
	});
	}
};

 
testCheckbox('id_of_checkbox', 'id_of_div');

 
<script>
   $(document).ready(function(){
 
 
 
   testCheckbox('showHide', 'targetDiv');
 
 
 
 
   function testCheckbox(key, target){
 
    if($('#'+key).is(":checked")){
     $('#'+target).show();
    }
    else {
     $('#'+target).hide();
    }
 
    $('#'+key).click( 
 
 
 
      function()
       {
 
        if($('#'+key).is(":checked"))
         {
          $('#'+target).show();
         }
        else
         {
          $('#'+target).hide();
         }
       }
     );
 
 
   }
 
   });
</script>

$(document).ready(function() {
 
		$("#demo-menu > li > a").not(":first").find("+ ul").slideUp(1);
 
		$("#demo-menu > li > a > span").text('+'); // add an indicator to the menu items to show there is a child menu
 
		$("#demo-menu > li> a").each(function() {
			toggleMenu(this);
			checkCookie(this);
		});
 
 
 
		function checkCookie(id)
			{
				/*
 
						check if there is a cookie set for a sub menu 
						if there is then show the menu
 
				*/
 
				var cookieName = id.id;
 
				var c = readCookie(cookieName);
 
				if(c === 'show') {
 
					$(id).each(function() {
 
						$(this).children("span").text('-');
						$(this).find("+ ul").slideDown('fast');
 
					});
 
				}
			}
 
		function toggleMenu(id)
			{
				$(id).click(function() {
					/*
							toggle the +/- indicators
					*/
					togglePlusMinus(this);	
 
					/*
						toggle the menu open or closed
					*/
					$(this).find("+ ul").slideToggle("fast");
 
				});
			}
 
		function togglePlusMinus(id)
			{
 
				$(id).each(function() {
 
					if($(this).find("+ ul").is(':visible'))
						{
							$(this).children("span").text('+');
							eraseCookie(this.id);
						}
					else
						{
							$(this).children("span").text('-');
							createCookie(this.id, 'show', 365);
						}
 
				});
			}
 
});
 
// cookie functions http://www.quirksmode.org/js/cookies.html
 
function createCookie(name,value,days)
	{
		if (days)
		{
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}
function readCookie(name)
	{
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++)
		{
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}
function eraseCookie(name)
	{
		createCookie(name,"",-1);
	}

<ul id="demo-menu">
	<li><a href="#">item one</a></li>
	<li><a href="#">item two</a></li>
	<li><a href="#" id="three" >item three<span></span></a> 
		<ul>
			<li><a href="#">item 3.1</a></li>
			<li><a href="#">item 3.2</a></li>
			<li><a href="#">item 3.3</a>
 
			</li>
		</ul>
	</li>
	<li><a href="#">item four</a></li>
	<li><a href="#" id="five">item five <span></span></a> 
		<ul>
				<li><a href="#">item 5.1</a></li>
				<li><a href="#">item 5.2</a></li>
				<li><a href="#">item 5.3</a></li>
		</ul>
	</li>
	<li><a href="#">item six</a></li>
 
</ul>