【 -moz 】
/* Firefox 4 */
-moz-transition:width 2s;
-moz-transition-timing-function:linear;
-moz-transition:width 2s;
-moz-transition-timing-function:linear;
【 -webki 】
/* Safari and Chrome */
-webkit-transition:width 2s;
-webkit-transition-timing-function:linear;
/* Safari and Chrome */
-webkit-transition:width 2s;
-webkit-transition-timing-function:linear;
【 -o 】
/* Opera */
-o-transition:width 2s;
-o-transition-timing-function:linear;
/* Opera */
-o-transition:width 2s;
-o-transition-timing-function:linear;
【 -ms 】
/* IE(>=IE9) */
-ms-transition:width 2s;
-ms-transition-timing-function:linear;
-ms-transition-timing-function:linear;