Validation on a form in JS
Since you are only checking all of your fields against null, you could add the field names to an array and then loop through the array.

var isValid = true;
var fields  = ['title', 'description', 'objectives', 'outcome', 'hours'];

for ( var i = 0, n = fields.length; i &lt; n; i++ ) {
    key = fields[i];
    if ( formData[key] == null ) {
        console.log("error on " + key);
        isValid = false;
    } else {
        console.log(key + " is valid");
    }
}