resize the image to fit the dimensions of TD

Just make the images width to 100% and make the height auto to keep the images from looking distorted

so something like

#menu img{
      display:block; width:100%; height:auto;
}

If you want it to fit exactly, use width:100% and height:100%.

The properties max-width and max-height do not set the dimensions of an element, they restrict the dimensions.