css3 之 修改input 输入框的placeholder 默认样式

/* 通用 */
::-webkit-input-placeholder { color:#999999; text-align: center;font-size: 15px;font-weight: bold; }
::-moz-placeholder { color:#f00; } /* firefox 19+ */
:-ms-input-placeholder { color:#f00; } /* ie */
input:-moz-placeholder { color:#999999;text-align: center;font-size: 15px; font-weight: bold;}

/* webkit专用 */
#field2::-webkit-input-placeholder { color:#00f; }
#field3::-webkit-input-placeholder { color:#090; background:lightgreen; text-transform:uppercase; }
#field4::-webkit-input-placeholder { font-style:italic; text-decoration:overline; letter-spacing:3px; color:#999; }

/* mozilla专用 */
#field2::-moz-placeholder { color:#00f; }
#field3::-moz-placeholder { color:#090; background:lightgreen; text-transform:uppercase; }
#field4::-moz-placeholder { font-style:italic; text-decoration:overline; letter-spacing:3px; color:#999; }