function changeTab(tabNum,totalTabNum) {
    for(intX=1;intX<=totalTabNum;intX++){
      if(intX==tabNum){
        document.getElementById('tab' + intX).style.display = "block";
      }
      else{
        document.getElementById('tab' + intX).style.display = "none";
      }
    }
}

function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
} 
window.onload = externalLinks;

function openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function emailpagetofriend() {
    mail_str = "mailto:?subject= " + document.title;
    mail_str += "&body= I recommend -- " + document.title;
    mail_str += " " + location.href;
    location.href = mail_str;
}