Question

i´m pretty new to php so im stuck with a easier calculator script…well… not easy to me but at least it doesnt sound too complicated.

firstly, i need to create a calculator that has 2 inputs… a dropdown list with cars (4 of them) that each of has a value (price per kilometer) and a textbox that user fills with a kilometer value (how many km´s he wants to drive). Then the output should be with jquery (live result). Operation is, of course, multiplying.

i would really appreciate if someone could help me out in this. im good at html and css but totally out of php.

<div class="styled-select"> 
  <select name="dropdown"> 
    <option value="<?=$car1;?>">Mercedes</option> 
    <option value="<?=$car2;?>">Scania</option> 
    <option value="<?=$car3;?>">Renault</option> 
    <option value="<?=$car4;?>">MAN</option> 
  </select> </div> 

Answer 1

I think this is what you are after

HTML

<input id="distance"/>
<select name="dropdown" id="cars">/* options*/
<input id="result"/>   

jQuery:

$(function(){
    $('#cars, #distance').on('keyup change',function(){
        var dist=$('#distance').val();  
        var car=$('#cars').val();
        var res=  dist * car ;
        $('#result').val( res || 0 );
    });
});

DEMO: http://jsfiddle.net/d8ETu/