function fb_share() { 
  var url = "http://www.facebook.com/sharer.php?u=http://www.raileisure.com"; 
  mywindow = window.open(url,'Facebook','height=300,width=600');
  mywindow.moveTo(250,400);
}

function tw_share() { 
  var url = encodeURI("http://twitter.com/home?status=Check out this great self-catering holiday accommodation in Lincolnshire: http://www.raileisure.com"); 
  mywindow = window.open(url,'Facebook','height=600,width=600');
  mywindow.moveTo(250,300);
}

function em_share() { 
  var url = encodeURI("email.php?t=" + document.title + "&u=" + document.location); 
  mywindow = window.open(url,'Facebook','height=600,width=460');
  mywindow.moveTo(250,300);
}