SSM架構表單送出不為空判斷

<script type="text/javascript">
function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {alert(alerttxt);return false}
  else {return true}
  }
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(uname,"使用者昵稱不能為空!")==false)
    {uname.focus();return false}
  if (validate_required(upassword,"登入密碼不能為空!")==false)
  {upassword.focus();return false}
  if (validate_required(urealname,"真實姓名不能為空!")==false)
  {urealname.focus();return false}
  if (validate_required(uphone,"使用者電話不能為空!")==false)
  {uphone.focus();return false}
  if (validate_required(uaddress,"使用者位址不能為空!")==false)
  {uaddress.focus();return false}
  if (validate_required(utype,"請選擇是否成為會員!")==false)
  {utype.focus();return false}
  }
}
</script>