reload the page without refreshing???

if you are loading the div with an ajax response, you can then use the callback handler of that ajax call

<<How can I make the call the $(document).ready(function(){ at runtime please ... or if it cannot be done... how can I do this please?>>
document.ready is called by itself. Its basically a event handler which is invoked when the page is loaded.

But why do you want to call this document.ready at run-time at first place?

Ref: But why do you want to call this document.ready at run-time at first place? ... I have some code that runs on $(document).ready(function(){ and I basically want to run it again because I'm changing things at runtime

For example, I have:

IF (thisvariable==0) {
  $('#myDiv1').hide();
} else {
    $('#myDiv1').show();
}

Now... when I change "thisvariable" value at runtime, I need to re-run the code so changes are made acordingly...know what I mean?

Thanks