Programming Examples
JavaScript program to validate a date
Write a JavaScript program to validate a date in dd/mm/yyyy format
Solution<!DOCTYPE HTML>
<html>
<head>
<title>Date Validation</title>
<script type="text/javascript" src="data.js"></script>
<style type="text/css">
.error_msg
{
color:#ff0000;
font-style:italic;
}
.result
{
color:#00ff00;
font-size:20px;
}
</style>
<script language="javascript">
function validate_date()
{
var chkdate = document.getElementById("dob").value
document.getElementById("error_msg_spn").innerHTML="";
document.getElementById("result_spn").innerHTML="";
if(document.getElementById("dob").value == "")
{
document.getElementById("error_msg_spn").innerHTML="Please enter the Date";
document.getElementById("dob").focus();
}
else if(!chkdate.match(/^(0[1-9]|[12][0-9]|3[01])[\/]((0[1-9]|1[012])[\/](19|20)[0-9]{2})$/))
{
document.getElementById("error_msg_spn").innerHTML="Date format is wrong";
document.getElementById("dob").focus();
}
else
{
document.getElementById("result_spn").innerHTML="This is Valid Date";
}
}
</script>
</head>
<body onload="get_cur_time()">
<h4>Result:</h4>
<form name="frm" id="frm">
<div>
<label for="dob">Enter the Date</label>
<input type="text" name="dob" id="dob" placeholder="DD/MM/YYYY"/>
<span id="error_msg_spn" class="error_msg">*</span>
</div>
<div>
<input type="button" name="check_btn" id="check_btn" value="validate" onclick="validate_date()"/>
</div>
<div>
<span id="result_spn" class="result"></span>
</div>
</form>
</body>
</html>Output/ Explanation: 