Validation - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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JavaScript Basics

Inserting Javascript

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Advance DHTML Tutorial


Validation

Let Javascript help you receive feedback from your visitors. The script also requires that all fields must be completed before the form is submitted. Great! Name: E-mail: Web Site: Comments:


Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function checkFields() { missinginfo = ""; if (document.form.name.value == "") { missinginfo += "\n - Name"; } if ((document.form.from.value == "") \|\| (document.form.from.value.indexOf('@') == -1) \|\| (document.form.from.value.indexOf('.') == -1)) { missinginfo += "\n - Email address"; } if ((document.form.website.value == "") \|\| (document.form.website.value.indexOf("http://") == -1) \|\| (document.form.website.value.indexOf(".") == -1)) { missinginfo += "\n - Web site"; } if(document.form.comments.value == "") { missinginfo += "\n - Comments"; } if (missinginfo != "") { missinginfo ="_____________________________\n" + "You failed to correctly fill in your:\n" + missinginfo + "\n_____________________________" + "\nPlease re-enter and submit again!"; alert(missinginfo); return false; } else return true; } // End --> </script>

Insert into <BODY>
<form action="http://cgi.freedback.com/mail.pl" name=form method=post onSubmit="return checkFields();"> <input type=hidden name=to value='spam-me-senseless@sitting-duck.net'> <input type=hidden name=subject value="Freedback"> <pre> Name: <input type=text name="name" size=30> E-mail: <input type=text name="from" size=30> Web Site: <input type=text value="http://" name="website" size=30> Comments: <textarea rows=3 cols=40 name="comments"></textarea> <input type=submit name="submit" value="Submit Form!"> </pre> </form>

Other Options