Step 1 : Save Below Script any name ex : ( abc.html )
<script>
function submitForm()
{
if(document.formName.name.value==''){
alert("Please Enter the name");
document.formName.name.focus();
return false;
}else{
document.formName.submit();
}
}
</script>
<body>
<form method='post' name="formName" action="formaction.php">
Enter Name & Press Tab : <input type="text" id="name" name="name" onBlur="return submitForm();" />
</form>
</body>
<?php echo "Thank You ".$_POST['name']." Your Form is Submited."; ?>
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