placeholder样式改变

::-webkit-input-placeholder{/* WebKit browsers */

color:#cccccc;

}

:-moz-placeholder{/* Mozilla Firefox 4 to 18 */

color:#cccccc;

}

::-moz-placeholder{/* Mozilla Firefox 19+ */

color:#cccccc;

}

:-ms-input-placeholder{/* Internet Explorer 10+ */

color:#cccccc;

}