/**
 * A function used to extend one class with another
 * 
 * @param {Object} subClass
 * 		The inheriting class, or subclass
 * @param {Object} baseClass
 * 		The class from which to inherit
 */
extend = function(subClass, baseClass) {
   function inheritance() {}
   inheritance.prototype = baseClass.prototype;

   subClass.prototype = new inheritance();
   subClass.prototype.constructor = subClass;
   subClass.baseConstructor = baseClass;
   subClass.superClass = baseClass.prototype;
}

function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}

function compareArrays(arr1,arr2) {
    if (arr1.length != arr2.length) return false;
    for (var i = 0; i < arr2.length; i++) {
        if (isArray(arr1)) { //likely nested array
        	if(!isArray(arr2)) return false;
            if (!compareArrays(arr1[i],arr2[i])) return false;
            else continue;
        }
        if (arr1[i] != arr2[i]) return false;
    }
    return true;
}
	
function getFunctionFromResponseText(responseText) {
	var i = responseText.indexOf(":");
	return responseText.substr(0,i);
}

function getDataFromResponseText(responseText) {
	var i = responseText.indexOf(":");
	return responseText.substr(i+1,responseText.length-i+1);
}

function createElement(tag,attributeArray) {
	var element = document.createElement(tag);
	if(undefined != attributeArray) {
		for(var i=0; i < attributeArray.length; i++) {
			element.setAttribute(attributeArray[i][0],attributeArray[i][1]);
		}
	}
	return element
}

function getNumericDataElement(number,addColor,addPlus,isCurrency,isPercent,returnString) {
	var className;
	var sign = "";
	if(number < 0){
		className = "negative";
	} else if(number == 0){
		className = "neutral";
	} else{
		className = "positive";
		sign = "+";
	}
	
	var elementText;
	if(isCurrency == true) {
		elementText = formatCurrency(number);
	} else {
		elementText = number;
	}
	if(addPlus == true) {
		elementText = sign + elementText;
	}
	if(isPercent == true) {
		elementText += "%";
	}
	
	if(returnString == true){
		return elementText;
	}
	
	var textNode = document.createTextNode(elementText);
	
	if(addColor == true) {
		var span = createElement("span",[["class",className]]);
		span.appendChild(textNode);
		return span;
	} else {
		return textNode;
	}
}

function formatCurrency(num) {
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
		num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
		cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));
	return (((sign)?'':'-') + '$' + num + '.' + cents);
}

function round(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}

function validateAndCommaStripNumeric(input,integer){
	var inputString = "";
	input = "" + input;
	
	if(input.indexOf('$') == 0) {
		input = input.substring(1,input.length);
	}
	
	for(var i=0; i<input.length; i++){
		switch(input.charAt(i)){
			case '1':
				inputString += input.charAt(i);
				break;
			case '2':
				inputString += input.charAt(i);
				break;
			case '3':
				inputString += input.charAt(i);
				break;
			case '4':
				inputString += input.charAt(i);
				break;
			case '5':
				inputString += input.charAt(i);
				break;
			case '6':
				inputString += input.charAt(i);
				break;
			case '7':
				inputString += input.charAt(i);
				break;
			case '8':
				inputString += input.charAt(i);
				break;
			case '9':
				inputString += input.charAt(i);
				break;
			case '0':
				inputString += input.charAt(i);
				break;
			case '.':
				if(integer == true) {
					alert("Full dollar amounts only.");
					return undefined;
				} else {
					inputString += input.charAt(i);
				}
				break;
			case ',':
				break;
			default:
				alert("Input must be numeric.");
				return undefined;
		}
	}
	if(input.indexOf('.') != input.lastIndexOf('.')) {
		alert("Input contains multiple decimal points.");
		return undefined;
	}
	
	return inputString;
}

function grayOut(vis, options) {
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout 
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {}; 
  var zindex = options.zindex || 50;
  var opacity = options.opacity || 70;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height 
    if( document.documentElement && ( document.documentElement.scrollWidth || document.documentElement.scrollHeight ) ) {
        var pageWidth = document.documentElement.scrollWidth+'px';
        var pageHeight = document.documentElement.scrollHeight+'px';
    } else if( document.documentElement.offsetWidth ) {
      var pageWidth = document.documentElement.offsetWidth+'px';
      var pageHeight = document.documentElement.offsetHeight+'px';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }   
    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;                      
    dark.style.MozOpacity=opaque;                   
    dark.style.filter='alpha(opacity='+opacity+')'; 
    dark.style.zIndex=zindex;        
    dark.style.backgroundColor=bgcolor;  
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';                          
  } else {
     dark.style.display='none';
  }
}

function getNodeValue(obj,tag)
{
	if(obj == undefined) {
		return undefined;
	}
	var elements = obj.getElementsByTagName(tag)
	if(elements != undefined && elements.length > 0){
		return elements[0].firstChild.nodeValue;
	}
	else{
		return undefined;
	}
}

function removeNodeChildren(obj) {
	if(obj == undefined) {
		return undefined;
	}
	// so long as obj has children, remove them
	while(obj.firstChild) obj.removeChild(obj.firstChild);
}

function getNodeElementById(obj,id) {
	if(obj == undefined) {
		return undefined;
	}
	
	var retval = undefined;
	
	for(var i=0; obj.firstChild != undefined && obj.firstChild.nodeValue != "undefined" && i < obj.childNodes.length; i++) {
		if(obj.childNodes[i].nodeType == 1 && obj.childNodes[i].getAttribute('id') != undefined && obj.childNodes[i].getAttribute('id').indexOf(id) == 0) {  //returns all left matches
			return obj.childNodes[i];
		}
		else {
			retval = getNodeElementById(obj.childNodes[i],id);
			if(retval != undefined) {
				break;
			}
		}
	}
	
	return retval;
}

function cloneObject(what) {
    for (i in what) {
        if (typeof what[i] == 'object') {
            this[i] = new cloneObject(what[i]);
        }
        else
            this[i] = what[i];
    }
}

function getKeyCode(e){
	var keycode;
	if (window.event) keycode = window.event.keyCode;
	else if (e) keycode = e.which;
	else return false;
	
	return keycode;
}

function checkKeyCode(keyCodeToCheckFor,e) {
	var keycode = getKeyCode(e);
	if(keycode == false) {
		return false;
	}
	
	if (keycode == keyCodeToCheckFor) {
		return true;
	} else {
		return false;
	}
}

function gotEnter(e) {
	return checkKeyCode(13,e);
}

function gotBackspace(e) {
	return checkKeyCode(8,e);
}

function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\\\s)"+searchClass+"(\\\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		var classNames = els[i].className.split(" ");
		for(k = 0; k < classNames.length; k++) {
			if ( pattern.test(classNames[k]) ) {
				classElements[j] = els[i];
				j++;
			}
		}
	}
	return classElements;
}

//make all notifications go away
function hideNotifications() {
	var notifications = getElementsByClass('notification',null,'div');
	
	for(var i=0; i < notifications.length; i++) {
		notifications[i].style.display='none';
	}
}

//make all dummy data go away
function hideDummy(node) {
	var elements = getElementsByClass('hasDummy',node,null);
	
	for(var i=0; i < elements.length; i++) {
		removeNodeChildren(elements[i]);
		if(elements[i].value != undefined) {// && elements[i].value.length > 0) {
			elements[i].value = '';
		}
		else {
			elements[i].appendChild(document.createTextNode("\u00a0"));
		}
	}
}

function ordinalize($number) {
	var mod100 = $number % 100;
	if (mod100 >= 11 && mod100 <= 13){
		return $number + 'th';
	}else{
		switch (($number % 10)) {
			case 1:
				return $number + 'st';
			case 2:
				return $number + 'nd';
			case 3:
				return $number + 'rd';
			default:
				return $number + 'th';
		}
	}
}

function isEmailValid(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    //alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}
	
function detectMacXFF() {
  var userAgent = navigator.userAgent.toLowerCase();
  if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1) {
    return true;
  }
}

function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}