function showNext(obj) {
	var txtParOne = document.getElementById("firstPart");
	var txtParTwo = document.getElementById("secondPart");
	var txtParThree = document.getElementById("thirdPart");
	
	if (txtParTwo.style.display == "none" && txtParThree.style.display == "none")
	{
	  txtParOne.style.display = "none";
	  txtParTwo.style.display = "block";
	}
	
	else if ( (txtParOne.style.display == "none") && (txtParThree.style.display == "none") && (obj.innerHTML == "Back") )
	{
	  txtParOne.style.display = "block";
	  txtParTwo.style.display = "none";
	}
	
	else if ( (txtParOne.style.display == "none") && (txtParThree.style.display == "none") && (obj.innerHTML == "Next") )
	{
	  txtParThree.style.display = "block";
	  txtParTwo.style.display = "none";
	}
	
	else if ( (txtParOne.style.display == "none") && (txtParTwo.style.display == "none") )
	{
	  txtParTwo.style.display = "block";
	  txtParThree.style.display = "none";
	}
  }