window.onload = chooseHeader;
var headers = new Array("Expert in C++","Knowledgeable in .NET and C#","Proficient in Java");
var thisHeader=0;
function chooseHeader()
{
  thisHeader=Math.floor(Math.random()*3);
  document.getElementById("rotatingHeaders").innerHTML=headers[thisHeader];
  rotate();
 }
 
function rotate()
{
  
  thisHeader++;
  if(thisHeader==headers.length)
  {
    thisHeader=0;
  }
  
  document.getElementById("rotatingHeaders").innerHTML=headers[thisHeader];
  setTimeout(rotate,headers.length*1000);
  
}