This Code selects and alters html5 Placeholder elements. You can now style them to whatever you want.

CSS_select-alter-placeholder-element.css

::-webkit-input-placeholder { color: #000; font-family: sans-serif; }
::-moz-placeholder { color: #000; font-family: sans-serif; } 
:-ms-input-placeholder { color: #000; font-family: sans-serif; }
input:-moz-placeholder { color: #000; font-family: sans-serif; }

.required::-webkit-input-placeholder:after { content: "*"; color: red; } 
.required::-moz-placeholder:after { content: "*"; color: red; } 
.required:-ms-input-placeholder:after { content: "*"; color: red; } 
.requiredinput:-moz-placeholder:after { content: "*"; color: red; }