/*** header ***
we will hide text and replace it with a image
we need to assign a height for it so that the image wont cut off
*/
div#header {
   height: 100px;    /* adjust according your image size */
   background: white;           
}

div#header h1 a {
/* you can set your own image here */
   background: #99C5CD url(/images/cms/logo1.gif) no-repeat 0px 1px ;
   display: block;
   height: 100px;             /* adjust according your image size */
   text-indent: -999em;  /* this hides the text */
   text-decoration:none; /* old firefox would have shown underline for the link, this explicitly hides it */
}