function check(obj) {
	var error = "", ext = obj.article.value.substr(obj.article.value.length-4,obj.article.value.length).toLowerCase()
	if (!obj.authors.value) {
	  error += "- Authors\n";
	  obj.authors.focus();
	}
	if (!obj.title.value) {
	  error += "- Title\n";
	  obj.title.focus();
	}
	if (!obj.article.value) {
	  error += "- Article document file\n";
	  obj.article.focus();
	} else if (ext != ".doc") {
		error += "- Document must be '.doc' only\n";
		obj.article.select();
	}
	if (!obj.email.value) {
	  error += "- Email Address\n";
	  obj.email.focus();
	} else if (obj.email.value.indexOf("@") == -1 || obj.email.value == "@." || (obj.email.value.indexOf("@") == (obj.email.value.length - 1))) {
	  error += "- Please input a valid email address\n";
	  obj.email.focus();
	}

	if (error) {
	  alert("Please input the following item(s):\n\n" +error);
	  return false;
	}
  }