Show/hide form element
Show or hide form elements based on the value selected in a dropdown menu.
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ซอร์สโค้ด
Sample web page showing the use of switch statements and the selectedindex property in javascript. If you try to return the selected index property directly you will only get -1 or 0 (equates to false or true). Make sure that the default displayed item matches the default settings in the switch statement.
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