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Rolf Watkins
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1 If you have a form and want to get the value of an input box, you need to use the val() function. Normal text and html function will not work here. The following example gets the text a user has entered in a text field and displays it on the page as soon as the user removes the focus from the text field: 1. Create a Web page containing the following code: <html xmlns=" <head> <title>m y T es t P age</title> <script src="jquery min.js " type="text/javascript"> </s c ript> <script type="text/javascript"> $ (document).ready(function () { $ (':text').foc us out(func tion () { alert($ (':text').val()); </s c ript> </head> <body> <input type = "text" /> <div></div> </body> </html> T his c ode c ontains a text field and a <div> element. T he c ode s ays, When the us er removes the foc us from the text field, s how an alert box and dis play the value of the text field. 2. Save this file, and then view it in your browser. 3. T ype something in the text field and then click anywhere outside the textbox to remove focus from the textbox. A n alert box opens c ontaining the text from the text field, as shown below

2 I ns tead of s howing an alert box, let us dis play the value in the <div> element. 4. Change alert($(':text').val()); to $('div').text( $ (':text').val() ); 6. Save the file, and then view it in your browser. 7. T ype something in the text field, and then click anywhere outside the text field. N ow the text field text appears in the <div> element, as s hown below

3 N ow, let extend this func tionality with s elec t form element, 8. Add this code to create a select box: <select id="a sianc ountries "> <option>i ndia</option> <option>p akistan</option> <option>srilanka</option> </s elec t> 9. A dd the following code in JavaScript function $('#A sianc ountries ').change(function () { $ (':text').val(($ (this ).val())); T he c hange () func tion detec ts the c hange in the value of the select element named AsianCountries'. When the select box value has changed, this change event is triggered. T he second line as s igns the value from the s elec t box to the text field. i.e. $ (this ).val will retrieve the value of form element and will assign it to text element by us ing its V al func tion.

1 0. Save this file, and then view it in your browser. 1 1. Select one of the drop-down values. A s s hown below, s elec ted value will be dis played in textbox. 12.

4 1 0. Save this file, and then view it in your browser Select one of the drop-down values. A s s hown below, s elec ted value will be dis played in textbox. 12. Add this code to create a check box group: A ls o add a button on c lic k of whic h m c hec kboxes will be s elec ted <input type="checkbox" name="location" value="india">india< <input type="checkbox" name="location" value="u S">U S</inpu <input type="checkbox" name="location" value="u K">U K</inpu <input type="checkbox" name="location" value="germany">ge <input type="checkbox" name="location" value="france">franc <input type="button" id="btnset" value="setcheckbox" title="se 1 3. A dd the JQuery function to set multiple values of checkbox. $('[name = Location]') will get the element with name Location. I n our c as e, element is c hec kbox. N ow array of values is s et as value to this c hec kbox. So, this V al func tion will matc h eac h of the value of an array with the c hec kboxes value and will s elec t the c hec kbox if the matc h happens.

5 $ ('#btns et').c lic k(func tion () { $ ('[name = Loc ation]').val(['u S', 'Germany', 'I ndia']); So, three different uses of Val function can be summarized as follows: Function val() val(value) val(values) Parameter Return Value None String Array The fetched value or values. wrapped set Wrapped set. Description Returns the value property of the first element in th When the element is a Multi-select element, the ret array of all selections. Sets the passed value as the value of all matched elements Causes any check boxes, radio buttons, or options o elements in the wrapped set to become selected if their values match any of the passed in the values here

T his article is downloaded from

T his article is downloaded from Sliding Elements with jquery T hes e are another s et of effec ts that hide or s how elements - s lidedown() and s lideu p(), T his works in a s imilar manner to the hide() and show() effects, except that