date validation - Javascript

13 New Member

hi all i know i am wrong in the date validation codes , please correct me , i am new to java script >>

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 <?php

//include_once "con_1.php";

/*$warn="";

     if (isset($_POST['email'])) 

    { $email=$_POST['email']; 

     if (preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/",$email))

    {}

     else 

        {

     $warn="please enter a valid email id";

}

}*/
 
?>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<script type="text/javascript">

<!-- Form Validation -->

function validate_form()

{

valid = true; 

var format = /^\d{2}\/\d{2}\/\d{4}$/;

var date1= document.logform.dob.value;

if ( document.logform.usname.value == "" ) { 

alert ( "Please enter your User Name" ); 

valid = false;

}

if ( document.logform.pass1.value == "" ) { 

alert ( "Please enter your User Name" ); 

valid = false;

}

if ( document.logform.pass2.value == "" ) { 

alert ( "Please enter your User Name" ); 

valid = false;

}

if ( document.logform.pass1.value != document.logform.pass2.value ) { 

alert ( " password mismatch" ); 

valid = false;

}

if(document.logform.dob.value == "")

{ alert("sa");

}

if ((!format.test(date1) )|| (!checkDate(format.exec(document.logform.dob))))

{alert("Please enter a date in the format mm/dd/yyyy");

}

var month = parseInt(date1[1]);

var date= parseInt(date1[2]);

var year= parseInt(date1[3]);

if (month<1 || month>12 || (day<30 || day>31)) valid=false;
 
switch (month) {
 
case 4: case 6: case 9: case 11:
 
if (day > 30) 

{ valid= false;
 
break;

}

case 2:

if((year%400 ==0) || (year%100 != 0 && year%4 == 0) and (date>29)) 

{ valid= false;

break;

}

else

if(date>28)

{ valid= false;

break;

}

default:
 
if (day > 31) 

{

valid=false;

break;

}

} 

var today = new Date();

var dd = today.getDate();

var mm = today.getMonth()+1;

var yyyy = today.getFullYear();
 
if (year<1 || year>yyyy) valid= false;
 
return valid;

}
 
<!-- Form Validation -->

</script>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

<title>Untitled Document</title>

<style type="text/css">

<!--

#Layer1 {

    position:absolute;

    left:44px;

    top:31px;

    width:130px;

    height:22px;

    z-index:1;

}

-->

</style>

</head>
 
<body>
 
<form action="" method="post" enctype="multipart/form-data" name="logform" onsubmit="return validate_form();">

<table cellpadding="3" cellspacing="2" border="0">

  <tr>

    <td width="30%">username</td>

    <td><input name="usname" type="text" id="usname" /></td>

  </tr>

  <tr>

    <td>password</td>

    <td colspan="2"><input name="pass1" type="text" id="pass1" /></td>

  </tr>

  <tr>

    <td>re-type password</td>

    <td colspan="2"><input name="pass2" type="text" id="pass2" /></td>

  </tr>

  <tr>

    <td>email id</td>

    <td colspan="2"><input name="email" type="text" id="email" /><marquee> <?php echo $warn?></marquee></td>

  </tr>

  <tr>

    <td>dob</td>

    <td><input name="dob" type="text" id="dob" /></td>

  </tr>

  <tr>

    <td align="center" colspan="2"><input type="submit" name="Submit" value="Submit" /></td>

  </tr>

  <select name="yourselection">

    <option value="">--Select--</option>

    <?php

 /*$msql = mysql_query("SELECT * FROM role");

 while($m_row = mysql_fetch_array($msql))        

        echo("<option value = '" . $m_row['role'] . "'>" . $m_row['role'] . "</option>");*/

    ?>

</select>

</body>

</html>

May 12 '12 #1

Subscribe Reply

1894

Dormilich

8,658

Recognized Expert Moderator Expert

there is a syntax error which would be listed in the Error Console. and line 48-50 do not make sense when compared to line 46.

additionally, your switch() statement is highly susceptible to execute checks you do not intend.

tip: the most simple leap year test I know:

Expand|Select|Wrap|Line Numbers

 function checkDay(day, month, year)

{

    return (new Date(year, month-1, day).getMonth() == month-1);

//  equivalent to

//  return (new Date(year, month-1, day).getDate() == day);

}

May 12 '12 #2

kavinhuh

New Member

@Dormilich
how should i break the date which is entered into the text field into date , month year
and wat does new date().getmonth () function does

May 12 '12 #3

Dormilich

8,658

Recognized Expert Moderator Expert

and wat does new date().getmonth () function does

see Description of the Date object

how should i break the date which is entered into the text field

consider the string you get. how could you break that up into the desired parts?

May 12 '12 #4

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