Why this JavaScript code is not redirecting to the URL ? What is wrong with this code?
function submitform() {
    var hiddenFieldValue = document.getElementById('course').value;
    alert("inindonesia.org/marketplace/tags/"+hiddenFieldValue);
    window.location.href= "inindonesia.org/marketplace/tags/"+hiddenFieldValue); 
    return false;
}
HTML code
<form autocomplete="off" method="POST">
        <p>
            Course Name <label>:</label>
            <input type="text" name="course" id="course" />
            <!--input type="button" value="Get Value" /-->
            <input type="text" name="course_val" id="course_val" />
        </p>
        <input type="submit" value="Submit" onClick="submitform()"/>
</form>
 
     
     
     
     
     
    