Defines the height of the content of the selected document. The actual size of an element is the total of heigh, margins, paddings and borders together. To handle content overflow issues use the overflow property.
heigh: 200px;
IE5.5+, FF1+, SA1.3+, OP9.2+
| em | Relative length value. A em unit is equal to the font-size value of the element used. |
| Percentage value | The regular format of a percentage value. |
| px | Pixel, a pixel unit represents a single dot on the screen. |