var act;
function over(){
var h = parseInt(document.getElementById("mytd").offsetHeight);
if (h < 540){
	
mytd.style.pixelHeight = h + 20;
colee.style.pixelHeight+=20;
clearTimeout(act);
act = setTimeout('over()', 5);
}
}
function out(){
var h = parseInt(document.getElementById("mytd").offsetHeight);
if (h >350){
mytd.style.pixelHeight = h - 20;
colee.style.pixelHeight-=20;
clearTimeout(act);
act = setTimeout('out()', 5);
}
}