JavaScript

Tuesday April 8, 2025
updated: April 10, 2002

 
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Lesson 8
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Lesson 8 Example 1: If Statement


Enter your E-mail address:

This example only tests if the email address contains an "@" character. Any "real life" code will have to test for punctuation, spaces and other things as well.

Code Head Code for Body
<script>
function validate()
{
x=document.myForm
at=x.myEmail.value.indexOf("@")
if (at == -1)
{
alert("Not a valid e-mail")
return false
}
}
</script>
 <form name="myForm"
onsubmit="return validate()">

Enter your E-mail address:
<input type="text" name="myEmail">
<input type="submit" value="Send input">
</form>
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© 2002 Tracy Johnson