50 lines
1.2 KiB
HTML
50 lines
1.2 KiB
HTML
<html>
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<head>
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<title>Example 7.11</title>
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<script>
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function getInfo()
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{
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var name = prompt("What's your name?");
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var email = prompt("What is your email address?");
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email = checkEmail(email);
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document.getElementById('first').innerHTML = name;
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document.getElementById('second').innerHTML = email;
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}
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function checkEmail(address)
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{
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flag = true; var atSign = "@"; var address; var okSign = true;
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while (flag)
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{
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var numChars = address.length;
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for( j = 1; j < (numChars -5); j++)
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{
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if (address.charAt(j) == atSign)
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okSign = false;
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}
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if ((address.charAt(numChars - 4) != ".") || (okSign == true))
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{
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alert("Not a valid email address");
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address = prompt('Enter a valid email address or enter "quit" to exit the program');
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if (address == "quit")
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{
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address = "unavailable";
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flag = false;
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}
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}
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else
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flag = false;
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}
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return address;
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}
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</script>
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</head>
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<body><table align="center" width = "70%"><tr><td><br />
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<input type ="button" onclick="getInfo()" value = "Enter your information"><br />
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<h3>Your name is: <span id = "first"> </span></h3>
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<h3>Your email address is: <span id = "second"> </span></h3>
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</td></tr></table>
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</body>
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</html>
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