/* This function is used to change the style class of an element */
function swapClass(obj, newStyle) {
	obj.className = newStyle;
}

function isUndefined(value) {
	var undef;
	return value == undef;
}
function checkUncheckAll(theElement) {
	var theForm = theElement.form, z = 0;
	for (z = 0; z < theForm.length; z++) {
		if (theForm[z].type == 'checkbox' && theForm[z].name != 'checkall') {
			theForm[z].checked = theElement.checked;
		}
	}
}
function checkAll(theForm) { // check all the checkboxes in the list
	for ( var i = 0; i < theForm.elements.length; i++) {
		var e = theForm.elements[i];
		var eName = e.name;
		if (eName != 'allbox' && (e.type.indexOf("checkbox") == 0)) {
			e.checked = theForm.allbox.checked;
		}
	}
}

/* Function to clear a form of all it's values */
function clearForm(frmObj) {
	for ( var i = 0; i < frmObj.length; i++) {
		var element = frmObj.elements[i];
		if (element.type.indexOf("text") == 0
				|| element.type.indexOf("password") == 0) {
			element.value = "";
		} else if (element.type.indexOf("radio") == 0) {
			element.checked = false;
		} else if (element.type.indexOf("checkbox") == 0) {
			element.checked = false;
		} else if (element.type.indexOf("select") == 0) {
			for ( var j = 0; j < element.length; j++) {
				element.options[j].selected = false;
			}
			element.options[0].selected = true;
		}
	}
}

/* Function to get a form's values in a string */
function getFormAsString(frmObj) {
	var query = "";
	for ( var i = 0; i < frmObj.length; i++) {
		var element = frmObj.elements[i];
		if (element.type.indexOf("checkbox") == 0
				|| element.type.indexOf("radio") == 0) {
			if (element.checked) {
				query += element.name + '=' + escape(element.value) + "&";
			}
		} else if (element.type.indexOf("select") == 0) {
			for ( var j = 0; j < element.length; j++) {
				if (element.options[j].selected) {
					query += element.name + '=' + escape(element.value) + "&";
				}
			}
		} else {
			query += element.name + '=' + escape(element.value) + "&";
		}
	}
	return query;
}

/* Function to hide form elements that show through
 the search form when it is visible */
function toggleForm(frmObj, iState) // 1 visible, 0 hidden 
{
	for ( var i = 0; i < frmObj.length; i++) {
		if (frmObj.elements[i].type.indexOf("select") == 0
				|| frmObj.elements[i].type.indexOf("checkbox") == 0) {
			frmObj.elements[i].style.visibility = iState ? "visible" : "hidden";
		}
	}
}

/* Helper function for re-ordering options in a select */
function opt(txt, val, sel) {
	this.txt = txt;
	this.val = val;
	this.sel = sel;
}

/* Function for re-ordering <option>'s in a <select> */
function move(list, to) {
	var total = list.options.length;
	index = list.selectedIndex;
	if (index == -1)
		return false;
	if (to == +1 && index == total - 1)
		return false;
	if (to == -1 && index == 0)
		return false;
	to = index + to;
	var opts = new Array();
	for (i = 0; i < total; i++) {
		opts[i] = new opt(list.options[i].text, list.options[i].value,
				list.options[i].selected);
	}
	tempOpt = opts[to];
	opts[to] = opts[index];
	opts[index] = tempOpt
	list.options.length = 0; // clear

	for (i = 0; i < opts.length; i++) {
		list.options[i] = new Option(opts[i].txt, opts[i].val);
		list.options[i].selected = opts[i].sel;
	}

	list.focus();
}

/*  This function is to select all options in a multi-valued <select> */
function selectAll(elementId) {
	var element = document.getElementById(elementId);
	len = element.length;
	if (len != 0) {
		for (i = 0; i < len; i++) {
			element.options[i].selected = true;
		}
	}
}

/* This function is used to select a checkbox by passing
 * in the checkbox id
 */
function toggleChoice(elementId) {
	var element = document.getElementById(elementId);
	if (element.checked) {
		element.checked = false;
	} else {
		element.checked = true;
	}
}

/* This function is used to select a radio button by passing
 * in the radio button id and index you want to select
 */
function toggleRadio(elementId, index) {
	var element = document.getElementsByName(elementId)[index];
	element.checked = true;
}

/* This function is used to open a pop-up window */
function openWindow(url, winTitle, winParams) {
	winName = window.open(url, winTitle, winParams);
	winName.focus();
}

/* This function is to open search results in a pop-up window */
function openSearch(url, winTitle) {
	var screenWidth = parseInt(screen.availWidth);
	var screenHeight = parseInt(screen.availHeight);

	var winParams = "width=" + screenWidth + ",height=" + screenHeight;
	winParams += ",left=0,top=0,toolbar,scrollbars,resizable,status=yes";

	openWindow(url, winTitle, winParams);
}

/* This function is used to set cookies */
function setCookie(name, value, expires, path, domain, secure) {
	document.cookie = name + "=" + escape(value)
			+ ((expires) ? "; expires=" + expires.toGMTString() : "")
			+ ((path) ? "; path=" + path : "")
			+ ((domain) ? "; domain=" + domain : "")
			+ ((secure) ? "; secure" : "");
}

/* This function is used to get cookies */
function getCookie(name) {
	var prefix = name + "="
	var start = document.cookie.indexOf(prefix)

	if (start == -1) {
		return null;
	}

	var end = document.cookie.indexOf(";", start + prefix.length)
	if (end == -1) {
		end = document.cookie.length;
	}

	var value = document.cookie.substring(start + prefix.length, end)
	return unescape(value);
}

/* This function is used to delete cookies */
function deleteCookie(name, path, domain) {
	if (getCookie(name)) {
		document.cookie = name + "=" + ((path) ? "; path=" + path : "")
				+ ((domain) ? "; domain=" + domain : "")
				+ "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}

// This function is for stripping leading and trailing spaces
function trim(str) {
	if (str != null) {
		var i;
		for (i = 0; i < str.length; i++) {
			if (str.charAt(i) != " ") {
				str = str.substring(i, str.length);
				break;
			}
		}

		for (i = str.length - 1; i >= 0; i--) {
			if (str.charAt(i) != " ") {
				str = str.substring(0, i + 1);
				break;
			}
		}

		if (str.charAt(0) == " ") {
			return "";
		} else {
			return str;
		}
	}
}

// This function is used by the login screen to validate user/pass
// are entered. 
function validateRequired(form) {
	var bValid = true;
	var focusField = null;
	var i = 0;
	var fields = new Array();
	oRequired = new required();

	for (x in oRequired) {
		if ((form[oRequired[x][0]].type == 'text'
				|| form[oRequired[x][0]].type == 'textarea'
				|| form[oRequired[x][0]].type == 'select-one'
				|| form[oRequired[x][0]].type == 'radio' || form[oRequired[x][0]].type == 'password')
				&& form[oRequired[x][0]].value == '') {
			if (i == 0)
				focusField = form[oRequired[x][0]];

			fields[i++] = oRequired[x][1];

			bValid = false;
		}
	}

	if (fields.length > 0) {
		focusField.focus();
		alert(fields.join('\n'));
	}

	return bValid;
}

// This function is a generic function to create form elements
function createFormElement(element, type, name, id, value, parent) {
	var e = document.createElement(element);
	e.setAttribute("name", name);
	e.setAttribute("type", type);
	e.setAttribute("id", id);
	e.setAttribute("value", value);
	parent.appendChild(e);
}

function confirmDelete(obj) {
	var msg = "Are you sure you want to delete this " + obj + "?";
	ans = confirm(msg);
	if (ans) {
		return true;
	} else {
		return false;
	}
}

function highlightTableRows(tableId) {
	var previousClass = null;
	var table = document.getElementById(tableId);
	var tbody = table.getElementsByTagName("tbody")[0];
	var rows;
	if (tbody == null) {
		rows = table.getElementsByTagName("tr");
	} else {
		rows = tbody.getElementsByTagName("tr");
	}
	// add event handlers so rows light up and are clickable
	for (i = 0; i < rows.length; i++) {
		rows[i].onmouseover = function() {
			previousClass = this.className;
			this.className += ' over'
		};
		rows[i].onmouseout = function() {
			this.className = previousClass
		};
		rows[i].onclick = function() {
			var cell = this.getElementsByTagName("td")[0];
			var link = cell.getElementsByTagName("a")[0];
			location.href = link.getAttribute("href");
			this.style.cursor = "wait";
		}
	}
}

function highlightFormElements() {
	// add input box highlighting
	addFocusHandlers(document.getElementsByTagName("input"));
	addFocusHandlers(document.getElementsByTagName("textarea"));
}

function addFocusHandlers(elements) {
	for (i = 0; i < elements.length; i++) {
		if (elements[i].type != "button" && elements[i].type != "submit"
				&& elements[i].type != "reset"
				&& elements[i].type != "checkbox"
				&& elements[i].type != "radio") {
			if (!elements[i].getAttribute('readonly')
					&& !elements[i].getAttribute('disabled')) {
				elements[i].onfocus = function() {
					this.style.backgroundColor = '#ffd';
					this.select()
				};
				elements[i].onmouseover = function() {
					this.style.backgroundColor = '#ffd'
				};
				elements[i].onblur = function() {
					this.style.backgroundColor = '';
				}
				elements[i].onmouseout = function() {
					this.style.backgroundColor = '';
				}
			}
		}
	}
}

function radio(clicked) {
	var form = clicked.form;
	var checkboxes = form.elements[clicked.name];
	if (!clicked.checked || !checkboxes.length) {
		clicked.parentNode.parentNode.className = "";
		return false;
	}

	for (i = 0; i < checkboxes.length; i++) {
		if (checkboxes[i] != clicked) {
			checkboxes[i].checked = false;
			checkboxes[i].parentNode.parentNode.className = "";
		}
	}

	// highlight the row    
	clicked.parentNode.parentNode.className = "over";
}

window.onload = function() {
	highlightFormElements();
	if ($('successMessages')) {
		new Effect.Highlight('successMessages');
		// causes webtest exception on OS X : http://lists.canoo.com/pipermail/webtest/2006q1/005214.html
		// window.setTimeout("Effect.DropOut('successMessages')", 3000);
	}
	if ($('errorMessages')) {
		new Effect.Highlight('errorMessages');
	}

	/* Initialize menus for IE */
	if ($("primary-nav")) {
		var navItems = $("primary-nav").getElementsByTagName("li");

		for ( var i = 0; i < navItems.length; i++) {
			if (navItems[i].className == "menubar") {
				navItems[i].onmouseover = function() {
					this.className += " over";
				}
				navItems[i].onmouseout = function() {
					this.className = "menubar";
				}
			}
		}
	}
}

// Show the document's title on the status bar
window.defaultStatus = document.title;