function getDiv1() {
 	 var div1 = document.getElementById("one");
 	 var div2 = document.getElementById("two");
 	 var div3 = document.getElementById("three");  
  		div1.style.display = "block";  
  		div2.style.display = "none";  
  		div3.style.display = "none";   
	}

	function getDiv2() {
	  var div1 = document.getElementById("one");
	  var div2 = document.getElementById("two");
	  var div3 = document.getElementById("three");  
	  	div1.style.display = "none";  
	  	div2.style.display = "block";  
	  	div3.style.display = "none";   
	}

	function getDiv3() {
	  var div1 = document.getElementById("one");
	  var div2 = document.getElementById("two");
	  var div3 = document.getElementById("three");  
	  	div1.style.display = "none";  
	  	div2.style.display = "none";  
	  	div3.style.display = "block";  
	}