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 //--Touch to dismiss keyboard
		UIButton *dismissKeyboardButtonBg = [UIButton buttonWithType:UIButtonTypeCustom];
		dismissKeyboardButtonBg.backgroundColor = [UIColor clearColor];
		[dismissKeyboardButtonBg addTarget:self action:@selector(dismissKeyboard:) forControlEvents:UIControlEventTouchUpInside];
		[dismissKeyboardButtonBg setFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
		[dismissKeyboardButtonBg setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
		[self.view addSubview:dismissKeyboardButtonBg];

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//dim the screen base on a slider value

[[UIScreen mainScreen] setBrightness:[(UISlider *)sender value]/100];

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if ( [[[UIDevice currentDevice] systemVersion] floatValue] >= 5.0 )
   NSLog (@"iOS version is greater than 5.0");

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//setup a UISlider programmatically
mySlider = [[[UISlider alloc] initWithFrame:CGRectMake(174, 12, 120, 23)] autorelease];
                mySlider.maximumValue = 100;
                mySlider.minimumValue = 30;
                mySlider.value = 100;
                [mySlider addTarget:self action:@selector(dimScreen:) forControlEvents:UIControlEventValueChanged];

//adding the slider to a table cell                
                cell.textLabel.text = @"My Slider";
                cell.accessoryView = mySlider;

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//HTML part

<div class="select-wrapper">					
    <select id="search_filter">
	<option value='username'>Username (recommended)</option>
	<option value='lastname'>Lastname</option>
    </select>
</div>

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$("#id_of_textbox").keyup(function(event){
    if(event.keyCode == 13){
        $("#id_of_button").click();
    }
});

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(function($) {
	
	// $ Works! You can test it with next line if you like
	// console.log($);
	
})( jQuery );

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//type this in the url field after page load
javascript:alert(document.documentElement.innerHTML);

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//version specific
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js'></script>

//always up to date
<script type='text/javascript' src='http://code.jquery.com/jquery-latest.js'></script>

//jquery ui
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js"></script> 

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<select name="garden" multiple="multiple">
 
    <option>Flowers</option>
    <option selected="selected">Shrubs</option>
    <option>Trees</option>
    <option selected="selected">Bushes</option>
 
    <option>Grass</option>
    <option>Dirt</option>
</select>