$(document).ready(function() {
  $(document).bind("contextmenu", function(e) {
    return false;
  });
});

$.fn.flash = function(color, duration) {
  var current = this.css('color');
  this.animate( {color: 'rgb(' + color + ')'}, duration / 2);
  this.animate( {color: current}, duration / 2);
}
$('#someid').flash('255,0,0', 1000);

$(function() {
  // document is ready..
})

// Safari
if( $.browser.safari )
{
//do something
}
//Above IE6
if ($.browser.msie && $.browser.version > 6 )
{
//do something
}
// IE6 and below
if ($.browser.msie && $.browser.version < 6 ) { //do something } // Firefox 2 and above if ($.browser.mozilla &amp;&amp; $.browser.version &gt;= "1.8" )
{
//do something
}

if($("#someDiv").length) {
  // yes it does, do something...
}