<script type="text/javascript"> function validateForm() { var a = document.forms["Form"]["answer_a"].value; var b = document.forms["Form"]["answer_b"].value; var c = document.forms["Form"]["answer_c"].value; var d = document.forms["Form"]["answer_d"].value; if (a == null || a == "", b == null || b == "", c == null || c == "", d == null || d == "") { alert("Please Fill All Required Field"); return false; } }</script><form method="post" name="Form" onsubmit="return validateForm()" action=""> <textarea cols="30" rows="2" name="answer_a" id="a"></textarea> <textarea cols="30" rows="2" name="answer_b" id="b"></textarea> <textarea cols="30" rows="2" name="answer_c" id="c"></textarea> <textarea cols="30" rows="2" name="answer_d" id="d"></textarea></form>
