


Text box input focus and defocus style implementation code_javascript skills
First, use the css pseudo-class: focus can be changed.
The html code of the text box is assumed to be as follows:
- Name:
- Password :
- Textarea:
- < textarea>
css code is written like this:
input[type="text" ]:focus, input[type="password"]:focus, textarea:focus { border: 1px solid #f00; background: #ccc; }
The text box, password box, and paragraph box are listed respectively. The style of the three input boxes when they are focused. Add a red border and gray background.
Is it that simple to solve now? Use a browser (Firefox, Safari, IE7) to test, everything is ok, but IE6 is not supported.
If you want IE6 to have the same beautiful effect, you can only use js. Here I use jquery to make one for you. Effect.
$(document).ready(function(){
$("input[@type='text'], input[@type='password'], textarea").focus( function(){ $(this). css({background:"#ccc", border:"1px solid #f00"})} );
});
Isn’t it very simple to make jquery? It feels similar to the way of writing css!
This is just the focus state. The out-of-focus state of jquery requires you to give instructions. It is silly and naive. It will not change back by itself, so then add the out-of-focus state.
$(document).ready(function(){
$("input[@type='text'], input[@type='password'], textarea").focus(function(){$(this).css({background:"#ccc", border: "1px solid #f00"})}).blur(function(){$(this).css({background: “#FFF”, border: “1px solid #ccc”})});
})
After defocusing, the background edge becomes white and the border becomes gray.
Of course you can also use jquery's addClass and removeClass to simplify the code:
$(document).ready(function(){
$("input[@type='text'], input[@type='password'], textarea").focus (function(){$(this).addClass("focus")}).blur(function(){$(this).removeClass("focus")});
})
First give the input box a default style. When it is focused, use addClass to add css "focus". When it is out of focus, use removeClass to remove css "focus".
All done!

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