$('#myTable')  

    .find('.firstColumn')  

        .css('background','red')  

    .end()  

    .find('.lastColumn')  

        .css('background','blue');

$.fn.mySetVal = function(x,y) {  

    return $(this).val(x,y);  

}

$ampm_time = date("g:i A", strtotime($24hr_time));

var timeFrom = new Date(from);

var timeTo = new Date(to);

if (timeFrom - timeTo > 0) {

  // do something if a date range is invalid

}

  url = 'http://somewhere.com';

  var rx = new RegExp();

  rx.compile(/http:\/\/[A-Za-z0-9\.-]{3,}\.[A-Za-z]{3}/);

  if (rx.test(url)) {

    doSomethingForURL();

  }