$(document).ready(function(){
function changeSource1()
  {
  document.getElementById("content3").src="7.html"
  document.getElementById("content3").height="324"
    document.getElementById("c1").innerHTML="<b>Advanced Test</b>";
  document.getElementById("c2").innerHTML="Novice Test";
  document.getElementById("c3").innerHTML="Questions: Tier I";
  document.getElementById("c4").innerHTML="Questions: Tier II";
  document.getElementById("c5").innerHTML="Questions: Tier III";
  }
 function changeSource2()
  {
  document.getElementById("content3").src="22.html"
  document.getElementById("content3").height="324"
       document.getElementById("c1").innerHTML="Advanced Test";
  document.getElementById("c2").innerHTML="<b>Novice Test</b>";
  document.getElementById("c3").innerHTML="Questions: Tier I";
  document.getElementById("c4").innerHTML="Questions: Tier II";
  document.getElementById("c5").innerHTML="Questions: Tier III";
  } 
  function changeSource3()
  {
  document.getElementById("content3").src="chntier1.htm"
  document.getElementById("content3").height="870"
      document.getElementById("c1").innerHTML="Advanced Test";
  document.getElementById("c2").innerHTML="Novice Test";
  document.getElementById("c3").innerHTML="<b>Questions: Tier I</b>";
  document.getElementById("c4").innerHTML="Questions: Tier II";
  document.getElementById("c5").innerHTML="Questions: Tier III";
  }
    function changeSource4()
  {
  document.getElementById("content3").src="chntier2.htm"
  document.getElementById("content3").height="1160"
      document.getElementById("c1").innerHTML="Advanced Test";
  document.getElementById("c2").innerHTML="Novice Test";
  document.getElementById("c3").innerHTML="Questions: Tier I";
  document.getElementById("c4").innerHTML="<b>Questions: Tier II</b>";
  document.getElementById("c5").innerHTML="Questions: Tier III";
  }
      function changeSource5()
  {
  document.getElementById("content3").src="chntier3.htm"
  document.getElementById("content3").height="1450"
       document.getElementById("c1").innerHTML="Advanced Test";
  document.getElementById("c2").innerHTML="Novice Test";
  document.getElementById("c3").innerHTML="Questions: Tier I";
  document.getElementById("c4").innerHTML="Questions: Tier II";
  document.getElementById("c5").innerHTML="<b>Questions: Tier III</b>";
  }

	var sections = $("#menu3 li");
	var loading = $("#loading3");
	var content = $("#content3");
	
	sections.click(function(){

		switch(this.id){
			case "c1":
				content.slideUp();
				onclick=changeSource1();
				content.slideDown();
				break;
			case "c2":
				content.slideUp();
				onclick=changeSource2();
				content.slideDown();
				break;
			case "c3":
				content.slideUp();
				onclick=changeSource3();
				content.slideDown();
				break;
			case "c4":
				content.slideUp();
				onclick=changeSource4();
				content.slideDown();
				break;
			case "c5":
				content.slideUp();
				onclick=changeSource5();
				content.slideDown();
				break;
			default:
				break;
		}
	});

	
});