$(document).ready(function(){
$('#send_message').click(function(e){  
	 e.preventDefault();  

	 var error = false;  
	 var name = $('#name').val();  
	 var email = $('#email').val();  
	 var subject = $('#subject').val();  
	 var message = $('#message').val();  


	 if(name.length == 0){  
		 var error = true;  
		 $('#name_error').fadeIn(500);  
	 }else{  
		 $('#name_error').fadeOut(500);  
	 }  
	 if(email.length == 0 || email.indexOf('@') == '-1'){  
		 var error = true;  
		 $('#email_error').fadeIn(500);  
	 }else{  
		 $('#email_error').fadeOut(500);  
	 }  
	 if(subject.length == 0){  
		 var error = true;  
		 $('#subject_error').fadeIn(500);  
	 }else{  
		 $('#subject_error').fadeOut(500);  
	 }  
	 if(message.length == 0){  
		 var error = true;  
		 $('#message_error').fadeIn(500);  
	 }else{  
		 $('#message_error').fadeOut(500);  
	 }  

	 if(error == false){  
		  $('#send_message').attr({'disabled' : 'true', 'value' : 'Vielen Dank!' }); 
		  $('#send_message').css("background-color", "#B7FBB9");
		  $('#send_message').css("cursor", "default");

		 $.post("send_email.php", $("#contact_form").serialize(),function(result){  
			 if(result == 'sent'){
				 $('#send_message').removeAttr('disabled').attr('value', 'Vielen Dank!');  
				 $('#send_message').css("background-color", "#B7FBB9");
			 }else{ 
				 $('#send_message').removeAttr('disabled').attr('value', 'Fehler! Drücken Sie F5!');  
				 $('#send_message').css("background-color", "#FFBABA");
			 }  
		 });  
	 }  
});
});