#aring {
position: relative; width: 400px; height: 22px; margin-right: 1.5em; margin-left: auto;
}

#area {
position: absolute; bottom: 0; width: 100%; height: 22px; background: url(../images/slide_bg.png); background-repeat:no-repeat;
}
 
#knob { 
width: 60px; height: 22px; background: url(../images/slider_bg.png); cursor: pointer;
}