EXAMPLE:
move cursor over this text

and move cursor over image

1. Copy the mouseover code from a working button image (see example below)
   onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('document.name_of_image','document.name_of_image','image.jpg','#963845234700')"
   
   
2. paste this code into your anchor tag for your text link (<a href....> tag) as below:
   <a href="somepage.html" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('document.name_of_image','document.name_of_image','image.jpg','#963845234700')">hyperlinked text </a>