เอาไปใส่ต่อท้าย CSS

input[type="reset"], input[type="submit"], button
{
-moz-border-radius: 0.5em !important;
border: 1px solid #CCC !important;
border-bottom: 1px solid #999 !important;
background-color: #EEE !important;
color: #000 !important;
}

input, textarea
{
-moz-border-radius: 0.8em !important;
}

input, textarea,select
{
background-color: #FFF !important;
border-top: 1px solid #989898 !important;
border-right: 1px solid #C3C3C3 !important;
border-bottom: 1px solid #DDD !important;
border-left: 1px solid #C3C3C3 !important;
color: #000 !important;
}

/*change them on focus with a blue border*/
input:not([type="button"]):not([type="reset"]):not([type="submit"]):not([type="checkbox"]):focus,textarea:focus
{
-moz-outline-radius: 0.8em !important;
}

input:not([type="button"]):not([type="reset"]):not([type="submit"]):not([type="checkbox"]):focus, textarea:focus, select:focus
{
-moz-outline: 2px solid #74C3CE !important;
-moz-outline-offset: -1px !important;
}

/*rollover effect on the buttons*/
input[type="submit"]:hover,input[type="reset"]:hover,button:hover {

border-color: #E8E9E8 !important;
border-bottom-color:#B6B4B6 !important;
background-color: #FCFCFC !important;
}


แล้วดูฟอร์ม
ปล ขโมยมาจาก userstyle.org ชื่อ Beautiful form
ปล2 ตัวอย่างดูฟอร์มคอมเมนต์ได้