CSS常用样式

1.placeholder 右对齐

text-align:right;  //只能满足苹果手机，不兼容安卓。

::-webkit-input-placeholder {color: #c7c7c7; direction: rtl; font-size:1.2rem;}
:-moz-placeholder {color: #c7c7c7; direction: rtl;font-size:1.2rem;}
::-moz-placeholder {color: #c7c7c7; direction: rtl;font-size:1.2rem;}
:-ms-input-placeholder {color: #c7c7c7; direction: rtl;font-size:1.2rem;}

2.css图片置灰

-webkit-filter:grayscale(100%);
-moz-filter:grayscale(100%);
-ms-filter:grayscale(100%);
-o-filter:grayscale(100%);
filter:grayscale(100%);
filter:gray;