function fun(state)
{
	var fisrt=document.getElementById("caidan_"+state);
  fisrt.style.display="block";
	if(state==1)
	{
  document.getElementById("caidan_"+2).style.display="none";
	}else if(state==2)
	{
		document.getElementById("caidan_"+1).style.display="none";
	}

 }
function fun1(state_1)
{
var sencd=document.getElementById("caidan_"+state_1);
sencd.style.display="none";
}
function fun2()
{
 for(var i=1; i<3;i++)
 {
	 document.getElementById("caidan_"+i).style.display="none";
 }	
}