dynamicaly populate input text box value on select onchange

Question

models.py

class Subject(models.Model):
    code =  models.CharField(max_length = 31)
    name = models.CharField(max_length = 31)
    credit = models.CharField(max_length = 31)

    def __unicode__(self):
        return str(self.code) + "-"+ str(self.name)



class Student(models.Model):
    name = models.CharField(max_length = 31)
    roll = models.CharField(max_length = 31)
    subject = models.ForeignKey(Subject, related_name = 'subjects') 
    marks = models.CharField(max_length = 31)


    def __unicode__(self):
        return str(self.name) + "-"+ str(self.roll)

views.py

def add_student(request):   
    subject = Subject.objects.all()
    if request.method == "POST":
        obj = Student()
        obj.name = request.POST['name']
        obj.roll = request.POST['roll']
        obj.subject = Subject.objects.get(name = request.POST['subject'])   
        obj.marks = request.POST['marks']
        obj.save()  

    var = RequestContext(request,{'title': ' Add Student','heading':'ADD STUDENT','subject':subject})
    return render_to_response('student.html',var)

And template is the followings..

<form action="." method="POST">
<table>
    <tr>
        <td>Subject</td>
    <td>
        <select id="subject" name= "subject">
            <option value="">- - Select - -</option>
            {% for i in subject %}
                <option>{{ i.name }}</option>
            {% endfor %}            
        </select> 
    </td>
    </tr>
    <tr>
        <td>Student Name</td>
    <td>
        <input id="name" type = "text" name ="name" /> 
    </td>
    </tr>
    <tr>
        <td>Student Roll</td>
    <td>
        <input id="roll" type = "text" name ="roll" /> 
    </td>
    </tr>

    <tr>
        <td>Marks</td>
    <td>
        <input id="marks" type = "text" name ="marks" /> 
    </td>
    </tr>

    <tr>
    <td>
        <input id="save" type = "Submit" value="Submit" /> 
    </td>

    </tr>


</form>
</table>

Now how will be the jquery if i want to select one subject from the select box then the name, roll and marks will be loaded dynamically on the corresponding text box as described above with jquery.