How To Update Textfield Values Based On Previous Entered Textfield Value

hiii alll

     I have one one form where i want to display values in textfields from database.

here is my form details:

MstPay(_form.php)

<table>

 &lt;tr&gt;


     &lt;td&gt;


            &lt;?php echo &#036;form-&gt;labelEx(&#036;model,'EmployeeId'); ?&gt;


	&lt;?php echo &#036;form-&gt;textField(&#036;model,'EmployeeId',array('size'=&gt;20,'maxlength'=&gt;20)); ?&gt;


	&lt;?php echo &#036;form-&gt;error(&#036;model,'EmployeeId'); ?&gt;


&lt;/td&gt;


&lt;td&gt;


	&lt;?php echo &#036;form-&gt;labelEx(&#036;model,'FixSalary'); ?&gt;


	&lt;?php echo &#036;form-&gt;textField(&#036;model,'FixSalary',array('size'=&gt;20,'maxlength'=&gt;20)); ?&gt;


	&lt;?php echo &#036;form-&gt;error(&#036;model,'FixSalary'); ?&gt;


&lt;/td&gt;


&lt;td&gt;


	&lt;?php echo &#036;form-&gt;labelEx(&#036;model,'Basic'); ?&gt;


	&lt;?php echo &#036;form-&gt;textField(&#036;model,'Basic',array('size'=&gt;20,'maxlength'=&gt;20)); ?&gt;


	&lt;?php echo &#036;form-&gt;error(&#036;model,'Basic'); ?&gt;


&lt;/td&gt;


 &lt;/tr&gt;

Here EmployeeId is a pk field.

I have Mstemployee table which has fields:

  1. EmployeeId Pk field.

  2. FixSalary.

  3. Basic.

My question is when i will enter some value in EmployeeId textfield i want to display FixSalary & Basic values assign for that EmployeeId pk field from mstemployee table.

Use Ajax to fetch the data on keyup.

can you please provide me any link Or example for such type.

PLZ.