JavaScript DHTML/Language Basics/do while

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Combine do-while loop and prompt dialog to read user input

 

<html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
do 
{
    sometext = prompt("Enter some text","");
}
while (sometext == "");
alert(sometext);
</script>
</head>
<body>
</body>
</html>



Use do-while loop and prompt dialog to restrict user input

 
<html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
do {
    sometext = prompt("Enter some text","Type some text");
}
while (sometext == "Type some text" || sometext == "" || sometext == null);
alert(sometext);
</script>
</head>
<body>
</body>
</html>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Language_Basics/do_while&oldid=3149»