$(document).ready(function(){
function changeSource1()
  {
  document.getElementById("content9").src="23.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="<b>U.S. Constitution</b>";
  document.getElementById("n2").innerHTML="Energy and Environment";
      document.getElementById("n3").innerHTML="China";
  document.getElementById("n4").innerHTML="U.S. Economy";
      document.getElementById("n5").innerHTML="U.S. Government";
  document.getElementById("n6").innerHTML="Iraq";
  }
 function changeSource2()
  {
  document.getElementById("content9").src="21.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="U.S. Constitution";
  document.getElementById("n2").innerHTML="<b>Energy and Environment</b>";
      document.getElementById("n3").innerHTML="China";
  document.getElementById("n4").innerHTML="U.S. Economy";
      document.getElementById("n5").innerHTML="U.S. Government";
  document.getElementById("n6").innerHTML="Iraq";
  } 
  function changeSource3()
  {
  document.getElementById("content9").src="22.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="U.S. Constitution";
  document.getElementById("n2").innerHTML="Energy and Environment";
      document.getElementById("n3").innerHTML="<b>China</b>";
  document.getElementById("n4").innerHTML="U.S. Economy";
      document.getElementById("n5").innerHTML="U.S. Government";
  document.getElementById("n6").innerHTML="Iraq";
  }
 function changeSource4()
  {
  document.getElementById("content9").src="24.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="U.S. Constitution";
  document.getElementById("n2").innerHTML="Energy and Environment";
      document.getElementById("n3").innerHTML="China";
  document.getElementById("n4").innerHTML="<b>U.S. Economy</b>";
      document.getElementById("n5").innerHTML="U.S. Government";
  document.getElementById("n6").innerHTML="Iraq";
  } 
  function changeSource5()
  {
  document.getElementById("content9").src="26.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="U.S. Constitution";
  document.getElementById("n2").innerHTML="Energy and Environment";
      document.getElementById("n3").innerHTML="China";
  document.getElementById("n4").innerHTML="U.S. Economy";
      document.getElementById("n5").innerHTML="<b>U.S. Government</b>";
  document.getElementById("n6").innerHTML="Iraq";
  }
    function changeSource6()
  {
  document.getElementById("content9").src="25.html"
  document.getElementById("content9").height="324"
         document.getElementById("n1").innerHTML="U.S. Constitution";
  document.getElementById("n2").innerHTML="Energy and Environment";
      document.getElementById("n3").innerHTML="China";
  document.getElementById("n4").innerHTML="U.S. Economy";
      document.getElementById("n5").innerHTML="U.S. Government";
  document.getElementById("n6").innerHTML="<b>Iraq</b>";
  }


  

	var sections = $("#menu9 li");
	var loading = $("#loading9");
	var content = $("#content9");
	
	sections.click(function(){

		switch(this.id){
			case "n1":
				content.slideUp();
				onclick=changeSource1();
				content.slideDown();
				break;
			case "n2":
				content.slideUp();
				onclick=changeSource2();
				content.slideDown();
				break;
			case "n3":
				content.slideUp();
				onclick=changeSource3();
				content.slideDown();
				break;
			case "n4":
				content.slideUp();
				onclick=changeSource4();
				content.slideDown();
				break;
			case "n5":
				content.slideUp();
				onclick=changeSource5();
				content.slideDown();
				break;
			case "n6":
				content.slideUp();
				onclick=changeSource6();
				content.slideDown();
				break;

			default:
				break;
		}
	});

	
});