run function at ready and keyup event

Question

Is there another in jquery to run a function at page load and at a keyup event instead of the way I'm doing it?

$(function() { 
  totalQty(); 
  $("#main input").keyup(function() { 
    totalQty(); 
  }); 
});

Answer 1

You can use $(document).ready event to run functions on load:

$(document).ready(function(){ 
    /* your code here */ 
});

Answer 2

Here's what I would do (jQuery 1.4+ )

$(document).ready(function() { 
  totalQty(); 
  $("#main").delegate("input","keyup",function() { 
    totalQty(); 
  }); 
});

Answer 3

Disregarding live or delegate optimizations, you can trigger an event like this:

$(function() { 
   $("#main input").keyup(function() { 
     totalQty();
   }).filter(":first").keyup(); //Run it once
});

No need for the filter if it's not on multiple elements, just leave it out in that case.