How do i call servlet from javascript after validation the javascript

Hi ,
Can anyone tell me how to call a servlet after the javascript is being validated. Here is my code to validate javascript i need to call a servlet inorder to save the data into the same form. I tried calling through the action method in the form but its directly taking me to the servlet but not validating the form. Is there any way that i can validate the form first then call the servlet.
Thanks in advance.
<html>
<head>
<title>Online Blog</title>
<script language ="javascript" type ="text/javascript">
function myfunction()
var mesg = "";
var dmesg = "";
var dnumber = 0;
var number = 0
var Blogstr = document.onlineblog.BlogName;
var Fnamestr = document.onlineblog.FirstName;
var Lnamestr = document.onlineblog.LastName;
var Datestr = document.onlineblog.Dateformat;
var Imagestr = document.onlineblog.uploadimage;
var Imageval = Imagestr.value;
var flength = parseInt(Imageval.length) - 3;
var fext = Imageval.substring(flength,flength + 3);
var Dateval = Datestr.value;
var Dformat = /^\d{2}\/\d{2}\/\d{4}/; //checks the date format.
//splits date into mm, dd , yyyy format.
var m = Dateval.split("/")[0];
var d = Dateval.split("/")[1];
var y = Dateval.split("/")[2];
//Get today's date (removes time).
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1;
var yyyy = today.getFullYear();
//checks if month and date are displayed in mm, dd format and if not sets to mm,dd.
if (mm <10)
mm = '0'+mm;
if (dd <10)
dd = '0'+dd;
//checks if name of the blog is empty
if(Blogstr.value == "")
number = number+1;
mesg += "\n" + number + "Name of the blog";
//checks if value of Frist Name is empty;
if(Fnamestr.value == "")
number = number+1;
mesg += "\n" + number + "First Name";
//checks if value of Last Name is empty;
if(Lnamestr.value == "")
number = number+1;
mesg += "\n" + number + "Last Name";
//checks if value of date is empty;
if(Datestr.value == "")
number = number+1;
mesg += "\n" + number + "Date of mm/dd/yyyy format";
//checks if value of image field is empty;
if(Imagestr.value == "")
number = number+1;
mesg += "\n" + number + "select an image";
//displays all the error messages.
if (number > 0)
alert ("Please enter the following" + mesg);
return false;
//checks if entered date format is mm/dd/yyyy
if(!Dformat.test(Dateval))
dnumber = dnumber +1;
dmesg += "\n" + dnumber + "please enter a valid date(mm/dd/yyyy)";
//checks if date is greater than 12 and is 2 digits.
if ((m>12 && m<100) || (m> = 100 && m<1000) || (m==0))
dnumber = dnumber+1;
dmesg += "\n" + dnumber + "Enter valid month(mm)";
//checks if month has 31 or 30 days and is in dd format.
if (((d>30) && (d<100) && (m == 04 || m == 06 || m == 9 || m == 11)) || ((m == 01 || m == 03 || m == 05 || m == 07 || m == 08 || m == 10 || m==12) && (d >31) && (d<100)) || d == 0)
dnumber = dnumber+1;
dmesg += "\n" + dnumber + "Enter valid date(dd)";
//checks if month has 28 or 29 days and wheather is a leap year or not.
if((m == 02 && d>29 && y%4 == 0) || (m == 02 && d>28 && y%4 != 0))
dnumber = dnumber+1;
dmesg += "\n" + dnumber + "Enter valid date(dd)";
//checks if entered date is prior to the current date.
if((m == mm && d == dd && y == yyyy) || (y > yyyy)|| (d>=dd && m>=mm && m<=12 && y==yyyy) || (d<=dd && m>mm && y == yyyy && m<=12))
dnumber = dnumber + 1;
dmesg += "\n" + dnumber + "Please enter a date prior to the current date";
if (y == 0 || y < 1000 || y>9999) //checks if year is zero and is a 4 digit number.
dnumber = dnumber + 1;
dmesg += "\n" + dnumber + "Enter a valid year(yyyy)";
//checks if image format is jpg or gif.
if(fext != "jpg" && fext != "gif")
dnumber = dnumber + 1
dmesg += "\n" + dnumber + "You can only upload gif or jpg images.";
if(dnumber>0)
alert("please check the followin error messages"+dmesg);
return false;
</script>
<style type="text/css">
.style1 {color: #FF0000}
body {
     background-color: #FFCCFF;
h2 {
     color: #CC3399;
h1 {
     color: cc3399;
.style2 {
     font-family: Arial, Helvetica, sans-serif;
     font-weight: bold;
.style5 {color: #000000; font-family: "Times New Roman", Times, serif;}
</style>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><body>
<h1 align="center">Webloggers space</h1>
<p align="center">Home
<p>
<h4> Please enter the following details to register.</h4>
<p> <b>Note:</b> All fields marked with <span class="style1">*</span>(astrick)
are compulsory.</p>
<form action="servlet/BlogServlet" name="onlineblog" onsubmit = "return myfunction()" method="post">
<table width="60%" border="0" cellspacing="5" cellpadding="2">
<tr>
<td><span class="style1">*</span>Name of the Blog</td>
<td><input type="text" name="BlogName"/></td>
</tr>
<tr>
<td><span class="style1">*</span>First Name</td>
<td><input type="text" name="FirstName"/></td>
</tr>
<tr>
<td><span class="style1">*</span>Last Name</td>
<td><input type="text" name="LastName"/></td>
</tr>
<tr>
<td><span class="style1">*</span>Date(mm/dd/yyyy)</td>
<td><input type="text" name="Dateformat"/></td>
</tr>
<tr>
<td>Category</td>
<td><select name="catagory" size="1">
<option></option>
<option>Business</option>
<option>Education</option>
<option>Entertainment</option>
<option>Food</option>
<option>Hobbies</option>
<option>Personal</option>
<option>Politics</option>
<option>Sports</option>
</select></td>
</tr>
<tr>
<td>Enter your text here:</td>
<td><textarea name="textarea" cols="45" rows="5"></textarea></td>
</tr>
<tr>
<td><span class="style1">*</span>Upload Image <span class="style5">(.jpg
          or .gif)</span></td>
<td><input type="file" name="uploadimage" /></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="save">
<input type="reset" name="reset" value="Reset" /></td>
</tr>
</table>
</form>
</body>
</html>

Your javascript code contains a syntax error. That's why the function isn't being called. Take a look at this line in your code.
if ((m>12 && m<100) || (m> = 100 && m<1000) || (m==0))Notice the space between > and =. Remove that space.
m >= 100

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