holdpalce颜色改变

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

color: #f00;

}

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

color: #f00;

}

input:-ms-input-placeholder,

textarea:-ms-input-placeholder {

color: #f00;

}

input::-webkit-input-placeholder,

textarea::-webkit-input-placeholder {

color: #f00;

}