window.onload = init;

document.write('<style type="text/css">');
document.write("#exp img { display: none; }");
document.write('</style>');

function init () {
	showRandImg();
	if ($('yider') && $('searchForm')) {
		$('searchForm').onsubmit = checkSearch;
	}
	var forms = document.getElementsByTagName('form');
	for (var i = 0; i < forms.length; i++) {
		if (forms[i].id != 'yider' && window.location.toString().indexOf('search.asp') == -1) {
			clearInputs(forms[i])
		}
	}
	if ($('newsAlertForm')) {
		$('newsAlertForm').onsubmit = 'checkENews';
	}
	Jargon.init();
}

function checkENews() {
	var fields = ['Name', 'EmailAddress', 'Password'];
	var incompleteFields = [];
	for (var i = 0; i < fields.length; i++) {
		if ($(fields[i]).value.length == 0) {
			incompleteFields[incompleteFields.length] = $(fields[i]).name;
		}
	}
	if (incompleteFields.length == 0) {
		// validate email
		if (!/^([a-z0-9+_]|\-|\.)+@(([a-z0-9_]|\-)+\.)+[a-z]{2,6}$/i.test($('EmailAddress').value)) {
			alert('The email address entered is invalid.');
			return false;
		}
		return true;
	}
	var msg = 'The following fields are required:\n';
	for (var i = 0; i < incompleteFields.length; i++) {
		msg += '\no) ' + incompleteFields[i];
	}
	alert(msg);
	return false;
}

function checkSearch () {
	var ok = true;
	var yider = $('yider');
	if (!yider || !$('searchForm')) {
		return false;
	}
	if (yider.value.length == 0) {
		alert('You must enter some text to search for!');
		yider.focus();
		ok = false;
	}
	else if (yider.value.search(/\*/) != -1 && yider.value.search(/\s/) != -1) {
		alert('If you are using the * to generalise your search, you can only search for one word at a time!');
		yider.focus();
		ok = false;
	}
	else if (yider.value.search(/^\S+\*\S+$/) != -1) {
		alert('You can only use the * at the beginning or end of your search term');
		yider.focus();
		ok = false;
	}
	else if (yider.value == '*') {
		alert('You cannot search for a general * character!');
		yider.focus();
		ok = false;
	}
	return ok;
}

var clearedInputs = new Array();
function inputClear (o) {
	var o = $(o);
	if (!o) {
		return;
	}
	o.value = '';
	for (var i = 0; i < clearedInputs.length; i++) {
		if (clearedInputs[i] == o) {
			return;
		}
	}
	clearedInputs[clearedInputs.length] = o;
}

function clearInputs(formObj) {
	var inputs = formObj.getElementsByTagName('input');
	for (var i = 0; i < inputs.length; i++) {
		if (inputs[i].type == 'text') {
			inputClear(inputs[i]);
		}
	}
	var inputs = formObj.getElementsByTagName('textarea');
	for (var i = 0; i < inputs.length; i++) {
		inputClear(inputs[i]);
	}
}

function showRandImg () {
	var o = $('exp');
	if (!o) {
		return;
	}
	var baseImg = 'http://www.mwrlaw.com/wp-content/themes/mwrlaw/images/exps/exp';
	var noOfImages = 1;
	var img = document.createElement('img');
	img.alt = '';
	img.src = baseImg + (Math.floor(Math.random() * noOfImages) + 1) + '.jpg';
	img.style.display = 'block';
	while (o.childNodes.length > 0) {
		o.removeChild(o.childNodes[0]);
	}
	if (o) {
		o.appendChild(img);
	}
}

function $(element) {
	if (typeof element == 'string' && element.length > 0) {
		element = document.getElementById(element);
	}
	return element;
}

function $t(str) {
	return document.createTextNode(str);
}


/************************************************
*                                               *
*            Date object                        *
*                                               *
************************************************/

// format is used in a similar way to http://uk.php.net/date
// restricted chars must be escaped with a '\', however in javascript
// when writing the string the '\' itself must be escaped
// E.g. var str = new Date().format('\\Year: Y');  -> Year: 2005
//      var str = new Date().format('\Year: Y');   -> 2005ear: 2005
// note only the 1 '\' in the second example
Date.prototype.format = function (str) {
  this.procProps();
  var pos = 0;
  var buff = '';
  var esc = false;
  while (pos < str.length) {
    var c = str.charAt(pos);
    if (c == '\\' && !esc) {
      esc = true;
    }
    else if (this.isReservedChar(c) && !esc) {
      buff += eval('this.' + c);
    }
    else {
      buff += c;
      esc = false;
    }
    pos++;
  }
  return buff;
}
Date.prototype.isReservedChar = function (c) {
  for (var i = 0; i < this.reservedChars.length; i++) {
    if (this.reservedChars[i] == c) {
      return true;
    }
  }
  return false;
}
Date.prototype.strPad = function (strIn, padLength) {
  var strPad = '0';
  var strIn = new String(strIn);
  var j = strIn.length;
  for (var i = j; i < padLength; i++) {
    strIn = strPad + strIn;
  }
  return strIn;
}
Date.prototype.procProps = function () {
  // see http://uk.php.net/date for a list of the properties
  // D - A textual representation of a day, three letters (Sun through Sat)
  // l (lowercase 'L') - A full textual representation of the day of the week (Sunday through Saturday)
  // d - Day of the month, 2 digits with leading zeros (01 to 31)
  // j - Day of the month without leading zeros (1 to 31)
  // F - A full textual representation of a month, such as January or March (January through December)
  // m - Numeric representation of a month, with leading zeros (01 through 12)
  // M - A short textual representation of a month, three letters (	Jan through Dec)
  // Y - A full numeric representation of a year, 4 digits (Examples: 1999 or 2003)
  // y - A two digit representation of a year (Examples: 99 or 03)
  // H - 24-hour format of an hour with leading zeros (00 through 23)
  // i - Minutes with leading zeros (00 to 59)
  // s - Seconds, with leading zeros (00 through 59)
  // S - English ordinal suffix for the day of the month, 2 characters (st, nd, rd & th)
  this.reservedChars = ['D', 'l', 'd', 'j', 'F', 'm', 'M', 'Y', 'y', 'H', 'i', 's', 'S'];
  if (isNaN(this.getDate()) || isNaN(this.getMonth()) || isNaN(this.getFullYear())) { 
    this.setFullYear(1900, 0, 1);
  }
  var shortDays = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
  var longDays = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
  var monthNames = new Array ('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
  var shortMonthNames = new Array ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
  this.D = shortDays[this.getDay()];
  this.l = longDays[this.getDay()];
  this.d = this.strPad(this.getDate(), 2);
  this.j = this.getDate();
  this.F = monthNames[this.getMonth()];
  this.m = this.strPad(this.getMonth() + 1, 2);
  this.M = shortMonthNames[this.getMonth()];
  this.Y = this.getFullYear();
  this.y = (this.getYear() > 100) ? this.strPad(this.getYear() - 100, 2) : this.strPad(this.getYear(), 2);
  this.i = this.strPad(this.getMinutes(), 2);
  this.H = this.strPad(this.getHours(), 2);
  this.s = this.strPad(this.getSeconds(), 2);
  switch (this.getDate()) {
    case 1:
      this.S = 'st';
      break;
    case 2:
      this.S = 'nd';
      break;
    case 3:
      this.S = 'rd';
      break;
    case 21:
      this.S = 'st';
      break;
    case 22:
      this.S = 'nd';
      break;
    case 23:
      this.S = 'rd';
      break;
    case 31:
      this.S = 'st';
      break;
    default:
      this.S = 'th';
      break;
  }
}