Untitled

In best case how can I check a link belongs to *.domain.com?
// regular expression to check for domain.com
// won't match tricky ones like domain.company.com nodomain.com :)
var re = /(^|.)domain.com(/|$)/i;

// loop through all the links
$("a").each(function() {
  // test if href attribute belongs to domain.com
  if(re.test($(this).attr('href'))) {
    // do what you want with links that belong to domain.com
    $(this).addClass("domaincom");
  }
});