自定义表单样式之checkbox和radio

<form class="form" method="post">
	<fieldset>
		<legend>Which genres do you like?</legend>
		<input type="checkbox" value="action" id="check-1" name="genre"><label for="check-1" class="">Action / Adventure</label>
		<input type="checkbox" value="comedy" id="check-2" name="genre"><label for="check-2" class="">Comedy</label>
		<input type="checkbox" value="epic" id="check-3" name="genre"><label for="check-3" class="">Epic / Historical</label>
		<input type="checkbox" value="science" id="check-4" name="genre"><label for="check-4" class="">Science Fiction</label>
		<input type="checkbox" value="romance" id="check-5" name="genre"><label for="check-5" class="">Romance</label>
		<input type="checkbox" value="western" id="check-6" name="genre"><label for="check-6" class="">Western</label>
	</fieldset>	
	<fieldset>
		<legend>Caddyshack is the greatest movie of all time, right?</legend>
		<input type="radio" value="1" id="radio-1" name="opinions"><label for="radio-1" class="">Totally</label>
		<input type="radio" value="1" id="radio-2" name="opinions"><label for="radio-2" class="">You must be kidding</label>
		<input type="radio" value="1" id="radio-3" name="opinions"><label for="radio-3" class="">What's Caddyshack?</label>
	</fieldset>
</form>

jQuery.fn.customInput = function(){
	$(this).each(function(i){
		if($(this).is('[type=checkbox],[type=radio]')){
			var input = $(this);
			//get the associated label using the input's id
			var label = $('label[for='+input.attr('id')+']');
			//get type,for classname suffix
			var inputType = (input.is('[type=checkbox]')) ? 'checkbox' : 'radio';
			//wrap the input + label in a div
			$('<div class="custom-'+ inputType +'"></div>').insertBefore(input).append(input,label);
			//find all inputs in this set using the shared name attribute
			var allInputs = $('input[name='+input.attr('name')+']');
			//necessary for browsers that don't support the :hover pseudo class on labels
			label.hover(function(){
				$(this).addClass('hover');
				if(inputType == 'checkbox' && input.is(':checked')) {
					$(this).addClass('checkedHover');
				}
			},function(){
				$(this).removeClass('hover checkedHover');
			});
			
			//bind custom event, trigger it, bind click,focus,blur events
			input.bind('updateState',function(){
				if(input.is(':checked')){
					if(input.is(':radio')){
						allInputs.each(function(){
							$('label[for='+$(this).attr('id')+']').removeClass('checked');
						});
					};
					label.addClass('checked');
				} else {
					label.removeClass('checked checkedHover checkedFocus');
				}
			})
			.trigger('updateState')
			.click(function(){
				$(this).trigger('updateState');
			})
			.focus(function(){
				label.addClass('focus');
				if(inputType == 'checkbox' && input.is(':checked')) {
					$(this).addClass('checkedFocus');
				}
			})
			.blur(function(){
				label.removeClass('focus checkedFocus');
			});					
		}
	});
}

$('input').customInput();

/* wrapper divs */
			.custom-checkbox, 
			.custom-radio { 
				position: relative; 
				display: inline-block;
			}
			/* input, label positioning */
			.custom-checkbox input,
			.custom-radio input {
				position: absolute;
				left: 2px;
				top: 3px;
				margin: 0;
				z-index: -1;
			}
			.custom-checkbox label,
			.custom-radio label {
				display: block;
				position: relative;
				z-index: 1;
				font-size: 1.3em;
				padding-right: 1em;
				line-height: 1;
				padding: .5em 0 .5em 30px;
				margin: 0 0 .3em;
				cursor: pointer;
			}