function doSubmit()

{

	var formObj = document.forms['contact_form'];
   
	 if (!formObj.msg.value) 

		{

			alert('Enter Comments');

			formObj.msg.focus();

		}

		else if (formObj.msg.value.length < 4) 

		{

			alert('Too small comments');

			formObj.msg.focus();

		}

		else formObj.submit();

	}