/*
function drop(x) {

   var pullDown = new Array("commissioning", "transitioning", "freight");
   //alert("currentState = "+currentState);
   var currentState = document.getElementById(pullDown[x]).style.display;	
   switch (currentState) {
	case "block":
	document.getElementById(pullDown[x]).style.display = "none";
	break;
	case "none":
	document.getElementById(pullDown[x]).style.display = "block";
	break;
	default:
	document.getElementById(pullDown[x]).style.display = "none";
	break; 
  }
}
*/
var s = 0;
var g = 0;
var q = 5;

function drop(x){
if(s>450&&g==0){g=1;return;}
if(s<5&&g==1){g=0;return;}
if(g)q=-40;
if(!g)q=40;
s=s+q;
e=document.getElementById("u_"+x);
e.style.height = s + 'px';
t=setTimeout("drop("+x+");",0);
}