function displayit(p1) {
         var p1=document.getElementById(p1);
		 if (p1.style.visibility == "hidden"){
		     p1.style.visibility = "visible"
                     p1.style.display = "block";
                 }
		 else{
		     p1.style.visibility ="hidden"
                     p1.style.display = "none";
		}
}
//the following funcitons are for testing only
function displayit1() {
         var p1=document.getElementById('p1');
		 if (p1.style.visibility == "hidden"){
		     p1.style.visibility = "visible"
                     p1.style.display = "block";
                 }
		 else{
		     p1.style.visibility ="hidden"
                     p1.style.display = "none";
		}
}

function displayit2() {
         var p1=document.getElementById('p2');
		 if (p1.style.visibility == "hidden"){
		     p1.style.visibility = "visible"
                     p1.style.display = "block";
                 }
		 else{
		     p1.style.visibility ="hidden"
                     p1.style.display = "none";
		}
}