function validateFormOnSubmit(theForm) {
var reason = "";
	reason += validateFName(theForm.yourName);
	reason += validateEmail(theForm.yourEmail);
	reason += validateFrEmail(theForm.frEmail);
	//reason += validatePhone(theForm.usrPhone);
    //reason += validateMessage(theForm.message);
      
  if (reason != "") {
    alert("Some fields need correction:\n" + reason);
    return false;
  }

  //alert("All fields are filled correctly");
 // return false;
}


function validateFName(fld) {
    var error = "";
 
    if (fld.value.length <= 3) {
        fld.style.background = 'Yellow'; 
        error = "Please Enter your 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 = 'Yellow';
        error = "Please enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Please check that the email address is correctly formed.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validateFrEmail(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 = 'Yellow';
        error = "Please enter your friend's email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Please check that the email address is correctly formed.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}