.ui-combobox {
    position: relative;
    display: inline-block;
    width: 300px;
    }

.ui-combobox-toggle {
    position: absolute;
    top: 0;
    bottom: 0;
    margin-left: -1px;
    padding: 0;
    /* adjust styles for IE 6/7 */
    *height: 1.7em;
    *top: 0.1em;
    border: 1px solid #b1b1b1;
    }

.ui-combobox-input {
    margin: 0;
    background-image: url(../images/input_bg.jpg);
    font-family: Verdana;
    font-size: 12px;   
    -webkit-border-top-right-radius: 0px;
    -webkit-border-bottom-right-radius: 0px;
    -moz-border-radius-topright: 0px;
    -moz-border-radius-bottomright: 0px;
    border-top-right-radius: 0px;
    border-bottom-right-radius: 0px;
    border: 1px solid #b1b1b1;    
    }