var y = 0;
var g = 0;
var q = 0;

function changeheight(){
 if(y>45&&g==0){
 g=1;
 return;
 }
 if(y<5&&g==1){
 g=0;
 return;
 }
 if(g)q=-5;
 if(!g)q=4;
 y=y+q;
 e=document.getElementById("u");
 e.style.height = y + 'px';
  t=setTimeout("changeheight();",0);
}

function divVis(div) {
 thisdiv=document.getElementById(div);
 thisvis=thisdiv.style.visibility;
 if (thisvis=="visible") {
  pos="absolute";
  vis="hidden";
 }
 else {
  pos="relative";
  vis="visible";
 }
 thisdiv.style.position=pos;
 thisdiv.style.visibility=vis;
}

function divVis2(div) {
 thisdiv=document.getElementById(div);
 thisvis=thisdiv.style.display;
 if (thisvis=="block") { vis="none"; }
 else { vis="block"; }
 thisdiv.style.display=vis;
}