/* Chrome/Safari/Opera */

input::-webkit-input-placeholder,

textarea::-webkit-input-placeholder{color:#999;}

/* Firefox 19+ */

input::-moz-placeholder,

textarea::-moz-placeholder{color:#999;opacity:1;}

/* IE 10+ 注意这里只有一个冒号 */

input:-ms-input-placeholder,

textarea:-ms-input-placeholder{color:#999;}

.placeholder{color:#999;}

//焦点

input:focus::-webkit-input-placeholder,

textarea:focus::-webkit-input-placeholder{color:transparent;}

input:focus::-moz-placeholder,

textarea:focus::-moz-placeholder{color:transparent;}

原文链接 http://www.cnblogs.com/xyzhanjiang/p/4551243.html

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