function doSubmit()

{

	var formObj = document.forms['contact_form'];

	if (!formObj.email.value) 

	{

		alert('Enter Email');

		formObj.email.focus();

	}

	else

	{

		var regvar = /^[a-z0-9\._-]+@[a-z0-9\._-]+\.[a-z]{2,4}(,\s*[a-z0-9\._-]+@[a-z0-9\._-]+\.[a-z]{2,4})*$/;

		if (! regvar.test(formObj.email.value)) 

		{

			alert('Wrong Email Format');

			formObj.email.focus();

		}

		else 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();

	}

}