$(document).ready(function(){
function changeSource1()
  {
  document.getElementById("content10").src="1.html"
  document.getElementById("content10").height="324"
         document.getElementById("a1").innerHTML="<b>U.S. Constitution</b>";
  document.getElementById("a2").innerHTML="Energy and Environment";
      document.getElementById("a3").innerHTML="China";
  document.getElementById("a4").innerHTML="U.S. Economy";
      document.getElementById("a5").innerHTML="U.S. Government";
  document.getElementById("a6").innerHTML="Iraq";
  }
 function changeSource2()
  {
  document.getElementById("content10").src="6.html"
  document.getElementById("content10").height="324"
         document.getElementById("a1").innerHTML="U.S. Constitution";
  document.getElementById("a2").innerHTML="<b>Energy and Environment</b>";
      document.getElementById("a3").innerHTML="China";
  document.getElementById("a4").innerHTML="U.S. Economy";
      document.getElementById("a5").innerHTML="U.S. Government";
  document.getElementById("a6").innerHTML="Iraq";
  } 
  function changeSource3()
  {
  document.getElementById("content10").src="7.html"
  document.getElementById("content10").height="324"
         document.getElementById("a1").innerHTML="U.S. Constitution";
  document.getElementById("a2").innerHTML="Energy and Environment";
      document.getElementById("a3").innerHTML="<b>China</b>";
  document.getElementById("a4").innerHTML="U.S. Economy";
      document.getElementById("a5").innerHTML="U.S. Government";
  document.getElementById("a6").innerHTML="Iraq";
  }
 function changeSource4()
  {
  document.getElementById("content10").src="8.html"
  document.getElementById("content10").height="324"
           document.getElementById("a1").innerHTML="U.S. Constitution";
  document.getElementById("a2").innerHTML="Energy and Environment";
      document.getElementById("a3").innerHTML="China";
  document.getElementById("a4").innerHTML="<b>U.S. Economy</b>";
      document.getElementById("a5").innerHTML="U.S. Government";
  document.getElementById("a6").innerHTML="Iraq";
  } 
  function changeSource5()
  {
  document.getElementById("content10").src="9.html"
  document.getElementById("content10").height="324"
          document.getElementById("a1").innerHTML="U.S. Constitution";
  document.getElementById("a2").innerHTML="Energy and Environment";
      document.getElementById("a3").innerHTML="China";
  document.getElementById("a4").innerHTML="U.S. Economy";
      document.getElementById("a5").innerHTML="<b>U.S. Government</b>";
  document.getElementById("a6").innerHTML="Iraq";
  }
    function changeSource6()
  {
  document.getElementById("content10").src="10.html"
  document.getElementById("content10").height="324"
         document.getElementById("a1").innerHTML="U.S. Constitution";
  document.getElementById("a2").innerHTML="Energy and Environment";
      document.getElementById("a3").innerHTML="China";
  document.getElementById("a4").innerHTML="U.S. Economy";
      document.getElementById("a5").innerHTML="U.S. Government";
  document.getElementById("a6").innerHTML="<b>Iraq</b>";
  }


  

	var sections = $("#menu10 li");
	var loading = $("#loading10");
	var content = $("#content10");
	
	sections.click(function(){

		switch(this.id){
			case "a1":
				content.slideUp();
				onclick=changeSource1();
				content.slideDown();
				break;
			case "a2":
				content.slideUp();
				onclick=changeSource2();
				content.slideDown();
				break;
			case "a3":
				content.slideUp();
				onclick=changeSource3();
				content.slideDown();
				break;
			case "a4":
				content.slideUp();
				onclick=changeSource4();
				content.slideDown();
				break;
			case "a5":
				content.slideUp();
				onclick=changeSource5();
				content.slideDown();
				break;
			case "a6":
				content.slideUp();
				onclick=changeSource6();
				content.slideDown();
				break;

			default:
				break;
		}
	});

	
});