change the values of text box when page load using jquery

change the values of text box when page load using jquery

I need to change the value of dependent text box when the page load,I did with after the keyup, change and mouseover  method, but exactly what i need is changing of values when page load using jquery.
here this is my following code,Please help me guys..

  1. $(document).ready(function(){

  2. $("#product").on("keyup change mousemove", '.product-item select, .product-item input', function() {
  3.            var $line = $(this).parents('.product-item');
  4.            var currname  = $line.find('.dropdownbox1 option:selected').text();
  5.            var prodname  = $line.find('.dropdownbox2 option:selected').text();
  6. var option1  = $line.find('.textbox1').val();
  7.            var option2  = $line.find('.textbox2').val();
  8.     

  9.  var totalbuy = option1+option2;
  10. $line.find(".orderbox4").val(totalbuy.toFixed(2));
});
});