Facebook Button not working

<script type="text/javascript">

//<![CDATA[
   	window.fbAsyncInit = function() {
		FB.init({ appId: '', 
			status: true, 
			cookie: true,
			xfbml: true,
			oauth: true
		});
   		    
	  		  	function updateButton(response) {
	    	var button = document.getElementById('fb-auth');
		
			if(button) {   
			    if (response.authResponse) {
			    // user is already logged in and connected
			    button.onclick = function() {
			        if(jQuery('#login-form').length > 0){
			            jQuery('#modlgn-username').val('Facebook');
			            jQuery('#modlgn-passwd').val('Facebook');
			            jQuery('#login-form').submit();
			        } else if(jQuery('com-login-form').length > 0) {
			           jQuery('#username').val('Facebook');
			           jQuery('#password').val('Facebook');
			           jQuery('#com-login-form').submit();
			        }
			    }
			} else {
			    //user is not connected to your app or logged out
			    button.onclick = function() {
			        FB.login(function(response) {
			           if (response.authResponse) {
			              if(jQuery('#login-form').length > 0){
			                jQuery('#modlgn-username').val('Facebook');
			                jQuery('#modlgn-passwd').val('Facebook');
			                jQuery('#login-form').submit();
			              } else if(jQuery('#com-login-form').length > 0) {
			                 jQuery('#username').val('Facebook');
			                 jQuery('#password').val('Facebook');
			                 jQuery('#com-login-form').submit();
			              }
			          } else {
			            //user cancelled login or did not grant authorization
			          }
			        }, {scope:'email'});   
			    }
	    	}
	    }
	  }
	  // run once with current status and whenever the status changes
	  FB.getLoginStatus(updateButton);
	  FB.Event.subscribe('auth.statusChange', updateButton);	
	  	};
    //      
    jQuery(window).load(function() {
    	(function(){
    		if(!document.getElementById('fb-root')) {
    			var root = document.createElement('div');
    			root.id = 'fb-root';
    			document.getElementById('gkfb-root').appendChild(root);
    			var e = document.createElement('script');
    			e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
    			e.async = true;
    			document.getElementById('fb-root').appendChild(e);
    		}  
    	}());
    });
    //]]>
</script>