改变input标签中placeholder显示的颜色
::-webkit-input-placeholder { /* WebKit browsers */ color: #A9A9A9; } :-moz-placeholder { /* Mozilla Firefox 4 to 18 */ color: #A9A9A9; opacity: 1; } ::-moz-placeholder { /* Mozilla Firefox 19+ */ color: #A9A9A9; opacity: 1; } :-ms-input-placeholder { /* Internet Explorer 10+ */ color: #A9A9A9; }