.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;top:0;right:0;z-index:1;}
.ext-ie .x-form-file-wrap .x-form-file-text,.x-form-file-wrap .x-form-file-text{position:absolute;left:0;z-index:3;color:#777;}