/*
 * Clear Default Text: functions for clearing and replacing default text in
 * <input> elements.
 */

addEvent(window, 'load', init, false);

function init() {
    var formInputs = document.getElementsByTagName('input');
    
	for (var i = 0; i < formInputs.length; i++) 
	{
        var theInput = formInputs[i];
        
        
		if (theInput.type == 'text' && theInput.className.match(/\bcleardefault\b/)) {  
            
		/* Add event handlers */          
            
		addEvent(theInput, 'focus', clearDefaultText, false);
            
		addEvent(theInput, 'blur', replaceDefaultText, false);
            
            
		/* Save the current value */
            
		if (theInput.value != '') {
                

			theInput.defaultText = theInput.value;
            
		}
        
		}
    
	}

}



function clearDefaultText(e) {
    
	var target = window.event ? window.event.srcElement : e ? e.target : null;
    
	if (!target) return;
    
    
	if (target.value == target.defaultText) {
        
		target.value = '';
    
	}

}



function replaceDefaultText(e) {
    
	
	var target = window.event ? window.event.srcElement : e ? e.target : null;
    
	if (!target) return;
    
    
	if (target.value == '' && target.defaultText) {
        
		target.value = target.defaultText;
    
	}

}

/* 
 * Cross-browser event handling, by Scott Andrew
 */
function addEvent(element, eventType, lamdaFunction, useCapture) 
{
    
	if (element.addEventListener) 
	{
        
		element.addEventListener(eventType, lamdaFunction, useCapture);
        
		return true;
    
	} 
	else if (element.attachEvent) {
        
		var r = element.attachEvent('on' + eventType, lamdaFunction);
        
		return r;
    
	} else {
        
		return false;
    
	}

}



/* 
 * Kills an event's propagation and default action
 */

function knackerEvent(eventObject) {
    
	if (eventObject && eventObject.stopPropagation) {
        
		eventObject.stopPropagation();
    
	}
    
	if (window.event && window.event.cancelBubble ) {
        
		window.event.cancelBubble = true;
    
	}
    
    
	if (eventObject && eventObject.preventDefault) {
        
		eventObject.preventDefault();
    
	}
    
	if (window.event) {
        
		window.event.returnValue = false;
    
	}

}



/* 
 * Safari doesn't support canceling events in the standard way, so we must
 * hard-code a return of false for it to work.
 */
function cancelEventSafari() {
    
	return false;        

}



/* 
 * Cross-browser style extraction, from the JavaScript & DHTML Cookbook
 * <http://www.oreillynet.com/pub/a/javascript/excerpt/JSDHTMLCkbk_chap5/index5.html>
 */


function getElementStyle(elementID, CssStyleProperty) {
    
	var element = document.getElementById(elementID);
    
	if (element.currentStyle) {
        
		return element.currentStyle[toCamelCase(CssStyleProperty)];
    
	} 
	else if (window.getComputedStyle) {
        
		var compStyle = window.getComputedStyle(element, '');
        
		return compStyle.getPropertyValue(CssStyleProperty);
    
	} 
	else {
        
		return '';
    
	}

}



/* 
 * CamelCases CSS property names. Useful in conjunction with 'getElementStyle()'
 * From <http://dhtmlkitchen.com/learn/js/setstyle/index4.jsp>
 */


function toCamelCase(CssProperty) {
    
	var stringArray = CssProperty.toLowerCase().split('-');
    
	if (stringArray.length == 1) {
        
		return stringArray[0];
    
	}
    
	var ret = (CssProperty.indexOf("-") == 0)
 ? stringArray[0].charAt(0).toUpperCase() + stringArray[0].substring(1)
 : stringArray[0];
    
	for (var i = 1; i < stringArray.length; i++) {
        
		var s = stringArray[i];
        
		ret += s.charAt(0).toUpperCase() + s.substring(1);
    
	}
    
	return ret;

}



/*
 * Disables all 'test' links, that point to the href '#', by Ross Shannon
 */



function disableTestLinks() {
  
	var pageLinks = document.getElementsByTagName('a');
  
	for (var i=0; i<pageLinks.length; i++) {
    
		if (pageLinks[i].href.match(/[^#]#$/)) {
      
			addEvent(pageLinks[i], 'click', knackerEvent, false);
    
		}
  
	}

}



/* 
 * Cookie functions
 */


function createCookie(name, value, days) {
    
	var expires = '';
    
	if (days) {
        
		var date = new Date();
        
		date.setTime(date.getTime() + (days*24*60*60*1000));
        
		var expires = '; expires=' + date.toGMTString();
    
	}
    
	document.cookie = name + '=' + value + expires + '; path=/';

}



function readCookie(name) {
    
	var cookieCrumbs = document.cookie.split(';');
    
	var nameToFind = name + '=';
    
	for (var i = 0; i < cookieCrumbs.length; i++) {
        
		var crumb = cookieCrumbs[i];
        
		while (crumb.charAt(0) == ' ') {
            
			crumb = crumb.substring(1, crumb.length); 
			/* delete spaces */
        
		}
        
		if (crumb.indexOf(nameToFind) == 0) {
            
			return crumb.substring(nameToFind.length, crumb.length);
        
		}
    
	}
    return null;

}



function eraseCookie(name) {
    
	createCookie(name, '', -1);

}