function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function showCopyDate() {
	var copyright=new Date();
	var currYear=copyright.getFullYear();
	var copyDate = document.getElementById('copyDate');
	copyDate.innerHTML = "© " + currYear + " CIGNA";
}

addLoadEvent(showCopyDate);