simple validation in php but it not call, please help me

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HTML

<html>
<head>
<script>
	function validateForm()
	{
		var x = document.forms["myform"]["txtname"].value;
		if (x == null || x=="") {
			aleart ("please enter the name");
			return false;
		}
	}
</script>
</head>
<body>
	<form name="myform" action="demo.php">
		Name
		<input type ="text" name= "txtname"><br />
		<input type="submit" value ="Submit">
	</form>

</body>
</html>

Posted 19-Jun-15 20:18pm

Member 11779243

Updated 19-Jun-15 20:40pm

Tomas Takac

v2

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Peter Leow · Answer 1 · 2015-06-19T23:43:00

Solution 1

There is nothing php here.
First, one typo, it should be

alert

not

aleart

Next, you have not called the validateForm() function at all

<form name="myform" action="#" onSubmit="return validateForm();">

Posted 19-Jun-15 23:43pm

Peter Leow

Updated 20-Jun-15 0:32am

v2

Sradhanjali Behera · Answer 2 · 2015-06-21T05:49:00

During submitting your form you need to call validation function.use on submit event to call that validation function.and one more thing the alert message.its alert in stead of aleart.you can do validation simply by using Id .

HTML

<html>
<head>
<script>
	function validateForm()
	{
		var x = document.forms["myform"]["txtname"].value;
		if (x == null || x=="") {
			alert ("please enter the name");
			return false;
		}
	}
</script>
</head>
<body>
	<form name="myform" action="demo.php" onSubmit="return validateForm();">
		Name
		<input type ="text" name= "txtname"><br />
		<input type="submit" value ="Submit">
	</form>
 
</body>
</html>

Sradhanjali Behera · Answer 3 · 2015-06-21T05:51:00

Solution 4

here write <form name="myform" action="demo.php" onSubmit="return validateForm();">

Posted 21-Jun-15 5:51am

Sradhanjali Behera

Sradhanjali Behera · Answer 4 · 2015-06-21T06:17:00

Or You can do iit by using id also

HTML

<html>
<head>
<script>
	function validateForm()
	{
		var x = document.getElementById("txtname").value;
		if (x == null || x=="") {
			alert ("please enter the name");
			return false;
		}
	}
</script>
</head>
<body>
	<form name="myform" action="demo.php" onSubmit="return validateForm();">
		Name
		<input type ="text" name= "txtname" id="txtname"><br />
		<input type="submit" value ="Submit">
	</form>
 
</body>
</html>

simple validation in php but it not call, please help me

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