.x-form-file-wrap {position: relative;height: 22px;}
.x-form-file-wrap .x-form-file {position: absolute;right: 0;-moz-opacity: 0;filter:alpha(opacity: 0);opacity: 0;z-index: 2;height: 22px;}
.x-form-file-wrap .x-form-file-btn {position: absolute;right: 0;z-index: 1;}
.x-form-file-wrap .x-form-file-text {position: absolute;left: 0;z-index: 3;color: #777;}