IMG#cbDrpDwnBttn {position:absolute;z-index:100000;display:none;         } 

DIV#cbBoxbckgrnd {border-width:1px;
             border-style:solid;
             border-color:#efefef;
             position:absolute;
             top:50px;
             width:300px;
             left:350px;z-index:100000;background-color:ghostwhite;
 }
DIV#cbBox {border-width:1px;cursor:default;
             border-style:solid;
             border-color:lightslategray;
             position:absolute;
             top:50px; overflow:auto;
             width:300px;
             left:350px;background-color:transparent;z-index:1000001;
             } 
.cbListBoxItem     {height:16px;color:black;padding-left:5px;font-weight:normal;
             font-size:12px;font-family:arial;overflow:hidden;width:100%;
             border-style:none;background-color:transparent;}
.cbListBoxItemonmouse     {height:16px;color:white;padding-left:5px;font-weight:bold;
             font-size:12px;font-family:arial;overflow:hidden;width:100%;
             border-style:none;background-color:lightgrey;}