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<html>
<head>
<title>PHP login system</title>
// insert style.css file inside index.html
<link rel = "stylesheet" type = "text/css" href = "style.css">
</head>
<body>
<div id = "frm">
<h1>Login</h1>
<form name="f1" action = "authentication.php" onsubmit = "return validation()" method = "POST">
<p>
<label> UserName: </label>
<input type = "text" id ="user" name = "user" />
</p>
<p>
<label> Password: </label>
<input type = "password" id ="pass" name = "pass" />
</p>
<p>
<input type = "submit" id = "btn" value = "Login" />
</p>
</form>
</div>
// validation for empty field
<script>
function validation()
{
var id=document.f1.user.value;
var ps=document.f1.pass.value;
if(id.length=="" && ps.length=="") {
alert("User Name and Password fields are empty");
return false;
}
else
{
if(id.length=="") {
alert("User Name is empty");
return false;
}
if (ps.length=="") {
alert("Password field is empty");
return false;
}
}
}
</script>
</body>
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