public void Render()
{
var left = coordinate.Left - textarea.ScrollLeft();
var top = coordinate.Top - textarea.ScrollTop();
if (0 <= left && left <= textarea.Width() &&
0 <= top && top <= textarea.Height())
{
element
.Show()
.Css("left", coordinate.Left - textarea.ScrollLeft())
.Css("top", coordinate.Top - textarea.ScrollTop())
.Css("height", coordinate.Height);
}
else
{
element.Hide();
}
}