// JavaScript Document
var refer=true;
function show() 
{
	if (refer)
	{
		document.getElementById("drop").style.display="block"
		document.getElementById("drop1").style.display="none"
		refer=false;
	}
	else
	{
		document.getElementById("drop").style.display="none"
		document.getElementById("drop1").style.display="block"
		refer=true;
	}
}

var refer1=true;
function show1() 
{
	if (refer1)
	{
		document.getElementById("drop1").style.display="block"
		document.getElementById("drop").style.display="none"
		refer1=false;
	}
	else
	{
		document.getElementById("drop1").style.display="none"
		document.getElementById("drop").style.display="block"
		refer1=true;
	}
}