var classExternal = /\bext\b/;
var classExternal2 = /\bodkaz ext\b/;

    function externalLinks() {
      for ( x = 0; x < document.links.length; x++ ) {
        if ( classExternal.exec(document.links[x].className) ) {
          document.links[x].target="_blank";
        }
      }
    }
    function externalLinks2() {
      for ( x = 0; x < document.links.length; x++ ) {
        if ( classExternal2.exec(document.links[x].className) ) {
          document.links[x].target="_blank";
        }
      }
    }
    window.onload = externalLinks;
    window.onload = externalLinks2;