Jquery Form Submission & Form Check

function submissionCheck() {
  errors = "";
	// the nasty error string
	if (document.newsForm.firstName.value == "") {
		errors+= "First Name\n";
	}
	if (document.newsForm.lastName.value == "") {
		errors+= "Fist Name\n";
	}
	if (document.newsForm.email.value == "") {
		errors+= "Last Name\n";
	}
	if (document.newsForm.title.value == "") {
		errors+= "Title\n";
	}
	if (document.newsForm.occupation.value == "") {
		errors+= "Occupation\n";
	}
	if (errors == "") {
		$.post('http://www.buildingindustryshow.com/dev/includes/process.php', $("#newsForm").serialize(), function(data) {
			//$('#results').html(data);
			alert("success");
		});
	} else {
		alert("Please fill in the following fields:\n" + errors);
	}	
}