window.onload = function() {
    var links = document.getElementsByTagName("a");
    for (var i = 0; i < links.length; i++) {
      var rels = links[i].getAttribute("rel");
      if (rels) {
        var testpattern = new RegExp("external");
        if (testpattern.test(rels)) {
          links[i].onclick = function() {
            return !window.open(this.href);  
          }
        }
      }    
    }
  }
function show(f) {
if (f==1) {
document.getElementById('tab1').style.display = "block"; 
document.getElementById('tab2').style.display = "none";

document.getElementById('TabNav').className  = "TabActive";     
} else if (f==2) {
document.getElementById('tab1').style.display = "none"; 
document.getElementById('tab2').style.display = "block";

document.getElementById('TabNav').className  = "TabActive2";
	}
}