function validateFormOnSubmit(theForm) {
var reason = "";

  reason += validateName(theForm.Name);
  reason += validateCompany(theForm.Company);
  reason += validatePhone(theForm.Phone);
  reason += validateEmail(theForm.Email);
  reason += validateMessage(theForm.Message);
  if (reason != "") {
    alert("Some fields need correction:\n\n" + reason);
    return false;
  }

  alert("All fields are filled correctly");
}
function validateName(fld) {
    var error = "";
 
    if (fld.value == "") {
        fld.style.background = '#FFF0F0'; 
        error = "You didn't enter a name.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validateCompany(fld) {
    var error = "";
 
    if (fld.value == "") {
        fld.style.background = '#FFF0F0';
        error = "You didn't enter a company name.\n";
     } else {
        fld.style.background = 'White';
    }
   return error;
}  
function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = '#FFF0F0';
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = '#FFF0F0';
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = '#FFF0F0';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePhone(fld) {
    var error = "";  

   if (fld.value == "") {
        error = "You didn't enter a phone number.\n";
        fld.style.background = '#FFF0F0';
    } else {
		fld.style.background = 'White';
	}
    return error;
}
function validateMessage(fld) {
    var error = "";
 
    if (fld.value == "") {
        fld.style.background = '#FFF0F0'; 
        error = "You didn't enter a message.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}