function formCheck(formobj){
  // Enter name of mandatory fields
  var fieldRequired = Array("name", "message", "phone", "company");
  // Enter field description to appear in the dialog box
  var fieldDescription = Array("Name", "Message", "Phone", "Company");
  // dialog message
  var alertMsg = "Please complete the following fields:\n";

  var l_Msg = alertMsg.length;

  for (var i = 0; i < fieldRequired.length; i++){
    var obj = formobj.elements[fieldRequired[i]];
    if (obj){
      switch(obj.type){
        case "select-one":
        if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == "") {
          alertMsg += " - " + fieldDescription[i] + "\n";
        }
        break;
        case "select-multiple":
        if (obj.selectedIndex == -1) {
          alertMsg += " - " + fieldDescription[i] + "\n";
        }
        break;
        case "text":
        case "textarea":
        if (obj.value == "" || obj.value == null){
          alertMsg += " - " + fieldDescription[i] + "\n";
        }
        break;
        default:
      }
      if (obj.type == undefined){
        var blnchecked = false;
        for (var j = 0; j < obj.length; j++) {
          if (obj[j].checked){
            blnchecked = true;
          }
        }
        if (!blnchecked){
          alertMsg += " - " + fieldDescription[i] + "\n";
        }
      }
    }
  }

  if (alertMsg.length == l_Msg) {
    return true;
  } else {
    alert(alertMsg);
    return false;
  }
}