Negative text indent for input buttons
 

Negative text indent is normally used to hide the text value inside buttons, which lets you use custom background images for them. For some reason, IE doesn�t support negative text indent for input buttons.

input.button {
width:114px;
height:37px;
border: none;
background: transparent url(images/button_image.gif) no-repeat center;
overflow: hidden;
text-indent: -999px;
}