var newWindow = ""
function showExercise(myExerciseNameID) {
  if (!newWindow) {
  } else if (!newWindow.closed) {
    newWindow.window.close();
  }
	theFile = "http://www.efitnesstracker.net/resources/exerciseDetails.asp?exerciseNameID="+myExerciseNameID;
	newWindow = window.open(theFile,"ExerciseDetails",'scrollbars=yes,toolbar=no,width=580,height=650,top='+(screen.height-650)/2+',left='+(screen.width-580)/2);
	if (!newWindow) {
		alert("Please enable popups to view the requested window.");
	} else {
		newWindow.opener = this.window;
		newWindow.focus();
	}
}