var localValidation = { INVALID:0, VALID:1, INVALID_SKIP_GLOBAL:2, VALID_SKIP_GLOBAL:3 };

var VALIDATE = true;
function clearErrors(f)
{
    for(i=0;i<f.elements.length;i++)
    {
        if (f.elements[i].labelRef!==undefined)
        {
            setErrorDefault(f.elements[i]);
            removeClass(f.elements[i].labelRef,"errors");
        }
    }
}
function disableFormFields(f)  // this disables only some kinds of fields, not all. since navigation is done by form elements, those must be handled separately
{
    for(i=0;i<f.elements.length;i++)
        if (f.elements[i].nodeName.toLowerCase()=="textarea"||
            f.elements[i].nodeName.toLowerCase()=="select"||
            (f.elements[i].nodeName.toLowerCase()=="input" && (!f.elements[i].type || f.elements[i].type=="text")))
        {
            f.elements[i].disabled=true;
            addClass(f.elements[i],'disabled'); // make them easier to see
        }
}
function globalFormSubmit(f)
{
    if(!VALIDATE)
    {
        VALIDATE=true;
        return true;
    }
    var valid = true;
    var error;

    // form cleanup
    for(i=0;i<f.elements.length;i++)
    {
        if (f.elements[i].value!==undefined &&
            (f.elements[i].nodeName.toLowerCase()=="input" || f.elements[i].nodeName.toLowerCase()=="textarea"))
        {
            f.elements[i].value = f.elements[i].value.demoronise();
            f.elements[i].value = f.elements[i].value.trim();
        }
        if (f.elements[i].labelRef!==undefined)
        {
            // at least uppercase first letter of first word.  consider uppercasing all non-connective words
            if (/name/i.test(f.elements[i].labelRef.firstChild.data) && 
               !/user/i.test(f.elements[i].labelRef.firstChild.data) &&
            	f.elements[i].nodeName.toLowerCase()=="input")
                f.elements[i].value=f.elements[i].value.replace(/^[a-z]/,function(a) { return a.toUpperCase(); });
            setErrorDefault(f.elements[i]);
            removeClass(f.elements[i].labelRef,"errors");
        }
    }

    if (window.pageValidate)
    {
        switch(pageValidate(f))
        {
            case localValidation.INVALID:
                var valid = false;
                break;
            case localValidation.INVALID_SKIP_GLOBAL:
                //alert('Enter all required fields.');
                return false;
                break;
            case localValidation.VALID_SKIP_GLOBAL:
                return true;
                break;
            default:
                valid = true;
        }
    }


    //if (!valid) alert("Resolve the validation errors shown.");
    return genericFormCheck(f) && valid;
}

function genericFormCheck(f)
{
    var valid = true;
    // Global validation
    for(var i=0;i<f.elements.length;i++)
    {
        if (f.elements[i].validate==false) continue;
        if (f.elements[i].nodeName.toLowerCase()=='textarea' && // IE might use upper case since it is XHTML ignorant at present
            f.elements[i].textLengthLimit)
        {
            error = checkMaxLength(f.elements[i],f.elements[i].textLengthLimit);
            if (error)
                valid = addError(f.elements[i],error);
        }
        // generic phone number validation - examines all 3 fields
        if (f.elements[i].labelRef && /phone/i.test(f.elements[i].labelRef.firstChild.data) &&
            (!f.elements[i].labelRef.className || !/hide/.test(f.elements[i].labelRef.className)))
        {
            error = checkPhone(f.elements[i]);
            if (error)
                valid = addError(f.elements[i],error);
        }
        // generic zip code check
        if (f.elements[i].labelRef && /zip/i.test(f.elements[i].labelRef.firstChild.data) &&
            (!f.elements[i].labelRef.className || !/hide/.test(f.elements[i].labelRef.className)))
        {
            error = checkZip(f.elements[i]);
            if (error)
                valid = addError(f.elements[i],error);
		}
        // validate email fields
        if (f.elements[i].labelRef && /e-?mail/i.test(f.elements[i].labelRef.firstChild.data))
        {
            error = checkEmail(f.elements[i]);
            if (error)
                valid = addError(f.elements[i],error);
        }
        // and URLS
        if (f.elements[i].labelRef && /URL/.test(f.elements[i].labelRef.firstChild.data))
        {
            error = checkURL(f.elements[i]);
            if (error)
                valid = addError(f.elements[i],error);
        }
        if (f.elements[i].required)
            if (!formValue(f.elements[i]))
            {
                f.elements[i].errorText.data = "";
                valid = addError(f.elements[i],"This field is required");
            }
    }
    return valid;
}

function setErrorDefault(e)
{
    e.errorText.data = "";
    if (e.textLengthLimit && e.name && !/phone/i.test(e.name))
        e.errorText.data = " (max. "+e.textLengthLimit+")";
    if (e.required && e.labelRef.firstChild.data.charAt(0)!="*")
        e.errorText.data += " (required)";
}

function addError(el, err)
{
    if (el.labelRef!==undefined)
    {
        addClass(el.labelRef,"errors");
        el.errorText.data += " ("+err+")";
    }
    return false;
}

function checkMaxLength(fld, sz)
{
  var txt = dosnl(fld.value);
  if (txt.length>sz)
    return "The limit is "+sz+" characters.  Please reduce by "+(txt.length-sz)+".";
  return null;
}

function checkPhone(fld)  // this one will require more validation
{
    var a = formValue(fld);
    var i = fld.name.replace(/area/,"");
    var p = formValue(fld.form.elements[i+"prefix"]);
    var l = formValue(fld.form.elements[i+"line"]);
    if (!a && !p && !l) return null;

    var e = "";
    if(!a || /\D/.test(a) || a.length<3)
        e = "area code";
    if(!p || /\D/.test(p) || p.length<3)
        e += ", prefix";
    if(!l || /\D/.test(l) || l.length<4)
        e += ", line";
    e = e.replace(/^, /,'').replace(/, ([^,]*)$/," and $1"); //grammar

    if(!e) return null;
    return "A valid numeric "+e+(/, |and/.test(e)?" are":" is")+" required.";
}

function checkZip(fld)
{
    var z = formValue(fld);
    var ze = formValue(fld.form.elements[fld.name+"_ext"]);
    if (!z && !ze) return null;

    var e = "";
    if(!z || /\D/.test(z) || z.length<5)
        e = "zip code";
    if(ze && (/\D/.test(ze) || ze.length<4))
        e += " and zip extension";

    if(!e) return null;
    return "Invalid "+e;
}

function checkURL(fld)
{
    var v = formValue(fld);
    if (v && !/:\/\//.test(formValue(fld)))
        return "Enter a full URL (including http://).";
    return null;
}

function checkEmail(fld)
{
    var v = formValue(fld);
    if (v && !/\S+@\S+/.test(formValue(fld)))  // trivial check - don't check for TLD since that isn't actually needed for e-mail
        return "Enter a full e-mail address";
    return null;
}