ما مهمة هدا الكود

/*----------------Footer----------------*/
#chatbox_messenger .catBottom{
background: none !important;
}
#chatbox_messenger_form {
width: 550px;
background: none !important;
float: none !important;
bottom: 0px ;
position: fixed;
z-index: 999;
margin-left: auto;
margin-right: auto;
left: 0;
right: 0;
}
.chatfootertable {
-webkit-box-shadow: 0px 0px 4px #d4d4d4;
box-shadow: 0px -0px 4px #d4d4d4;
-moz-box-shadow: 0px 0px 4px #d4d4d4;
box-shadow: 0px 0px 4px #c6c6c6;
-moz-box-shadow: 0px 0px 4px #c6c6c6;
border-top: 1px solid #c9c9c9;
border-left: 1px solid #c9c9c9;
border-right: 1px solid #c9c9c9;
border-bottom: 0px;
height: 30px;
border-radius: 5px 5px 0px 0px;
-moz-border-radius: 5px 5px 0px 0px;
background-color: #ffffff;
background: -webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#f9f9f9));
background: -moz-linear-gradient(top, #ffffff, #e2e2e2);
}
.chatfootertable:hover {
border-top: 1px solid #a7a7a7;
border-left: 1px solid #a7a7a7;
border-right: 1px solid #a7a7a7;
}
.text-styles {
color: grey;
}
#divbold, #divitalic, #divunderline, #divstrike, #divcolor, #divsmilies {
background: url(http://i25.servimg.com/u/f25/14/45/99/41/110.jpg) repeat-x;
border: 1px solid #c9c9c9;
background-color: #ffffff;
border-radius: 3px;
-moz-border-radius: 3px;
}
#divbold:hover, #divitalic:hover, #divunderline:hover, #divstrike:hover, #divcolor:hover, #divsmilies:hover {
background: url(http://i25.servimg.com/u/f25/14/45/99/41/hover10.jpg) repeat-x;
border: 1px solid #a2a2a2;
}
#divbold:active, #divitalic:active, #divunderline:active, #divstrike:active, #divcolor:active, #divsmilies:active {
background: url(http://i25.servimg.com/u/f25/14/45/99/41/active10.jpg) repeat-x;
}
.gen label input#message {
height: 17px;
font-size: 12px;
border: 1px solid #c9c9c9;
background-color: #ffffff;
border-radius: 3px;
-moz-border-radius: 3px;
}
.gen label input#message:hover {
border: 1px solid #b2b2b2;
background-color: #f5f5f5;
}
.gen label input#message:focus {
border: 1px solid #a4a4a4;
background-color: #e0fdff;
}
.gen input#submit_button {
cursor: pointer;
color: #929292;
font-family: Arial Black;
text-transform: uppercase;
font-size: 12px;
padding-left: 2px;
padding-right: 2px;
background: url(http://i25.servimg.com/u/f25/14/45/99/41/110.jpg) repeat-x;
border: 1px solid #c9c9c9;
background-color: #ffffff;
border-radius: 3px;
-moz-border-radius: 3px;
}
.gen input#submit_button:hover {
color: #2c2c2c;
background: url(http://i25.servimg.com/u/f25/14/45/99/41/hover10.jpg) repeat-x;
border: 1px solid #a2a2a2;
}
.gen input#submit_button:active {
background: url(http://i25.servimg.com/u/f25/14/45/99/41/active10.jpg) repeat-x;
}