var mxvalid = false;

// Removes leading whitespaces
String.prototype.ltrim = function () {
    var re = /\s*((\S+\s*)*)/;
    return this.replace(re, "$1");
}

// Removes ending whitespaces
String.prototype.rtrim = function () {
    var re = /((\s*\S+)*)\s*/;
    return this.replace(re, "$1");
}

// Removes leading and ending whitespaces
String.prototype.trim = function () {
    return this.ltrim().rtrim();
}

Array.prototype.inArray = function (k) {
	for(var x = 0; x < this.length; x++) { if (this[x] == k) { return true; }}
	return false;
}

// requires jquery 1.3.2 and jquery-ui 1.7.2
function validate_form(frm) {

	var email_regex = /[a-zA-Z0-9!#$%&\'*+\/\=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?/;
	var naphone_regex = /^1?([2-9][0-8][0-9])(?!55501)(?!\d11)([2-9][0-9]{6})\d*$/;
	var blacklist_regex = /^.*@(gmail.com|hotmail.com|yahoo.com|yahoo.ca|example.com)$/;

    var invalid  = Array();
	var errors   = Array();
    var elements = Array();
	var radioProcess = Array();

    elements = $(':input'); //frm.getElementsByTagName('input textarea select');
    //elements[elements.length] = frm.getElementsByTagName('textarea');
    //elements[elements.length] = frm.getElementsByTagName('select');
    for(var x = 0; x < elements.length; x++) {
        var classes = elements[x].className.split(' ');
        for(var z = 0; z < classes.length; z++) {
			if (elements[x].type == 'radio' && !radioProcess.inArray(elements[x].name) && classes[z] == 'vfreq') {
				radioProcess[radioProcess.length] = elements[x].name;
				var found = false;
				for(var r = 0; r < elements.length; r++) { found = (found ? found : elements[r].type == 'radio' && elements[r].name == elements[x].name && elements[r].checked); if (found) { break; } }
				if (!found) {
					invalid[invalid.length] = '&nbsp;&nbsp;&nbsp;&nbsp;&bull; ' + field_label(elements[x]);
				}
			}
            if (elements[x].type != 'radio' && elements[x].value.trim().length == 0 && classes[z] == 'vfreq') // empty string and required
                invalid[invalid.length] = '&nbsp;&nbsp;&nbsp;&nbsp;&bull; ' + field_label(elements[x]);
			if (classes[z] == 'vfemail' && elements[x].value.trim().length > 0 && elements[x].value.trim().match(email_regex) == null)
				errors[errors.length] = field_label(elements[x]) + ' must be a valid email address.<br />';
			if (classes[z] == 'vfemailbl' && elements[x].value.trim().length > 0 && elements[x].value.trim().match(blacklist_regex) != null)
				errors[errors.length] = field_label(elements[x]) + ' is not accepted by our system, please use a different email address.<br />';
			if (classes[z] == 'vfemailmx' && elements[x].value.trim().length > 0 && !check_mxrecord(elements[x].value.trim()))
				errors[errors.length] = field_label(elements[x]) + ' cannot be verified with your domain<br /><br />Please try again.<br />';
			if (classes[z] == 'vfnaphonenum' && elements[x].value.trim().length > 0 && elements[x].value.replace(/[^0-9]/g, '').match(naphone_regex) == null)
				errors[errors.length] = field_label(elements[x]) + ' must be a valid north american phone number.<br />';

        }
    }

    if (invalid.length > 0 || errors.length > 0) {
		if (document.getElementById('vfdialog') == null) {
			var dialog = document.createElement('div');
			dialog.title = 'Form Submission';
			dialog.id = 'vfdialog';
			dialog.style.display = 'none';

			var body = document.getElementsByTagName('body');
			body[0].appendChild(dialog);
			jQuery("#vfdialog").dialog({
				bgiframe: true,
				modal: true,
				width: 400,
				buttons: {
					Ok: function() {
						jQuery(this).dialog('close');
					}
				},
				resizable: false
			});

		}

		var dialog = document.getElementById('vfdialog');

        dialog.innerHTML = ((invalid.length > 0 ? '<p>The following fields must be filled in:<br />' + invalid.join('<br />') + '</p>' : '') + (errors.length > 0 ? '<p>' + errors.join('<br />') + '</p>' : ''));
		jQuery("#vfdialog").dialog('open');
        return false;
    }
    return true;
}

function field_label(fld) {
	if (fld.title.length > 0)
		return fld.title;

	var labels = document.getElementsByTagName('label');

	for(var x = 0; x < labels.length; x++) {
		if (labels[x].htmlFor == fld.id)
			return labels[x].innerHTML.replace('*','').trim();
	}

	return fld.name;
}

function check_mxrecord(email) {
	if (window.XMLHttpRequest) {
		xhttp=new XMLHttpRequest();
	}
	else { // Internet Explorer 5/6
	  xhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}

	xhttp.open("GET","/_inc/mxcheck.php?e=" + email,false);
	xhttp.send(null);

	this.mxvalid = (xhttp.responseText == 1);
	return this.mxvalid;
}