Code:
<?xml version="1.0" encoding="[CONTENT_ENCODING/]"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="[LANG_CODE/]" lang="[LANG_CODE/]" dir="[BASE_DIRECTION/]">

<head>
	<meta http-equiv="Content-Type" content="[CONTENT_TYPE/]" />
	<title>Micro Customer Care</title>
	<style type="text/css">
		body {
			padding:0;
			margin:0;
		}
	</style>
	[STYLE_SHEETS/]
	<!--[if lt IE 7]>
		<link rel="stylesheet" type="text/css" href="css/ie5-6.css"/>
	<![endif]-->
	<script src="js/chat.js" type="text/javascript" charset="UTF-8"></script>
	<script src="js/lang/[LANG_CODE/].js" type="text/javascript" charset="UTF-8"></script>
	<script src="js/config.js" type="text/javascript" charset="UTF-8"></script>
	<script type="text/javascript">
		// <![CDATA[
		function OnSubmit()
{
	document.Form1.action = "formData.php" // Second target
	document.Form1.target = "iframe2";	 // Open in a iframe
	document.Form1.submit();			 // Submit the page
	return true;
	
}
			function initializeLoginPage() {
				document.getElementById('userNameField').focus();
				if(!ajaxChat.isCookieEnabled()) {
					var node = document.createElement('div');
					var text = document.createTextNode(ajaxChatLang['errorCookiesRequired']);
					node.appendChild(text);
					document.getElementById('errorContainer').appendChild(node);
				}
			}
			
			ajaxChatConfig.sessionName = '[SESSION_NAME/]';
			ajaxChatConfig.cookieExpiration = parseInt('[COOKIE_EXPIRATION/]');
			ajaxChatConfig.cookiePath = '[COOKIE_PATH/]';
			ajaxChatConfig.cookieDomain = '[COOKIE_DOMAIN/]';
			ajaxChatConfig.cookieSecure = '[COOKIE_SECURE/]';

			ajaxChat.init(ajaxChatConfig, ajaxChatLang, true, true, false);
		// ]]>
	</script>
</head>

<body onload="initializeLoginPage();">
	<div id="loginContent">
		<div id="loginHeadlineContainer">
			<h1>Micro Customer Care</h1>
		</div>
		<form id="loginForm" name="Form1" action="[LOGIN_URL/]" method="post" enctype="application/x-www-form-urlencoded">
			<div id="loginFormContainer">
				<input type="hidden" name="login" id="loginField" value="login"/>
				<input type="hidden" name="redirect" id="redirectField" value="[REDIRECT_URL/]"/>
				<div><label for="userNameField">[LANG]userName[/LANG]:</label><br />
				<input type="text" name="userName" id="userNameField" maxlength="[USER_NAME_MAX_LENGTH/]"/></div>
				<div><label for="emailField">Email</label><br />
				<input type="text" name="email" id="emailField"/></div>
				<!--<div><label for="channelField">[LANG]channel[/LANG]:</label><br />
				<select name="channelName" id="channelField">[CHANNEL_OPTIONS/]</select></div>
				<div><label for="languageSelection">[LANG]language[/LANG]:</label><br />
				<select id="languageSelection" name="lang" onchange="ajaxChat.switchLanguage(this.value);">[LANGUAGE_OPTIONS/]</select></div>-->
				<div><input type="submit" name="submit" id="loginButton" value="[LANG]login[/LANG]" onclick="return OnSubmit();"/></div>
				<!--<div id="loginRegisteredUsers">* [LANG]registeredUsers[/LANG]</div>-->
			</div>
		</form>
		<div id="errorContainer">[ERROR_MESSAGES/]<noscript><div>[LANG]requiresJavaScript[/LANG]</div></noscript></div>
		<!--
			Please retain the full copyright notice below including the link to blueimp.net.
			This not only gives respect to the amount of time given freely by the developer
			but also helps build interest, traffic and use of AJAX Chat.
			
			Thanks,
			Sebastian Tschan
		//-->
		<div id="copyright"><a href="http://www.microtechnologies.net/">Micro</a> &copy; <a href="http://www.microtechnologies.net/">Microtechnologies.net</a></div>
	</div>
</body>

</html>

Hi friends..
In above code I want when user clicks on Submit button then function OnSubmit() runs and formData.php automatically submitted but when users clicks on submit button, OnSubmit() runs but formData is not executed. Even it not give any errors like "formData file not found" etc. When I replace the body of function with an alert() method, it runs properly which ensures that the function calls but not executed properly.
Can anyone tell what is wrong in above code????
Please help....
Thanks in advance...