#contact_info为textarea的ID
#contact_info::-webkit-input-placeholder{ color:#999;}
#contact_info:-moz-placeholder{ color:#999;}
#contact_info::-moz-placeholder{ color:#999;}
#contact_info:-ms-input-placeholder{ color:#999;}
#contact_info为textarea的ID
#contact_info::-webkit-input-placeholder{ color:#999;}
#contact_info:-moz-placeholder{ color:#999;}
#contact_info::-moz-placeholder{ color:#999;}
#contact_info:-ms-input-placeholder{ color:#999;}