Form Validation in Javascript
Prerequisites
Lecture – The Document Object Model and the basic Javascript lectures Lecture – Basics – Javascript variables and scope and Lecture – Basics – Javascript Arrays
Other lectures on Form Validation at Lecture – Debugging Form Validation in Javascript and Lecture – Basics – Functions and Form Validation
Summary
Topics covered:
1. Creating forms using Javascript
2. Form validation using Javascript
3. How HTML5 acts with certain browsers
Video
http://online1.daytonastate.edu/player2.php?id=c3008b2c6f5370b744850a98a95b73ad
Reference Materials
<!DOCTYPE html>
<html>
<head>
<title>HTML 5 Form</title>
<link rel="stylesheet" type="text/css" href="/styles.css">
<script>
function validateForm()
{
var fname = document.forms["myForm"]["name"].value;
return validateNotBlank(fname, "Name");
}
function validateNotBlank(value, label)
{
if (value==null || value=="")
{
alert("Please enter a value for " + label);
return false;
}
return true;
}
</script>
</head>
<body>
<form name="myForm" onsubmit="return validateForm()" action="HTMLForm.html" >
<p>
<label>Enter Name (Javascript): <input type="text" name="name"></label><br/>
<label>Color(HTML5): <input type="color" /></label><br/>
<label>Date HTML5): <input type="date" /></label><br/>
<label>E-Mail(HTML5): <input type="email" placeholder="name@domain.com" /></label><br/>
<label>Number(HTML5): <input type="number" min="0" max="10" /></label><br/>
<label>Range(HTML5): <input type="range" min="0" max="10" value="5" /></label><br/>
</p>
<input type="submit" value="Submit" />
</form>
</body>
</html>
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Additional Information
This article has everything on HTML 5 for forms validation – http://diveintohtml5.info/forms.html