/* ************************************************************* */
function HashTable()
{
    this.entries = new Array();
    this.indexOf = function(k)
    {
        var idx = -1;
        for (var i = 0; i < this.entries.length; i++)
        {
            if (this.entries[i].key == k)
            {
                idx = i;
                break;
            }
        }
		return idx;
    };
    this.getValue = function(k)
    {
        var myval = null;
        var idx = this.indexOf(k);
        if (idx > -1)
        {
            myval = this.entries[idx].value;
        }
        return myval;
    };
    this.remove = function(i)
    {
        if (this.entries.length < i)
            this.entries.splice(i, 1);
    };
	this.removeByKey = function(k)
    {
		var i = this.indexOf(k);
		if (i > -1)
			this.remove(i);
    };
    this.replace = function(k, v)
    {
        var idx = this.indexOf(k);
        if (idx > -1)
        {
            var tmp = new Object();
            tmp.key = k;
            tmp.value = v;
            this.entries[idx] = tmp;
        }
        else
            this.add(k, v);
    };
    this.add = function(k, v)
    {
        var tmp = new Object();
        tmp.key = k;
        tmp.value = v;
        return this.entries.push(tmp);
    };
}
/* ************************************************************** */
Date.prototype.isLeapYear = function()
{
	var iYear = this.getFullYear();
	return ( iYear % 400 == 0 || (iYear % 100 != 0 && iYear % 4 == 0))
}
Date.prototype.getMonthDayCount = function()
{
	var mnthAry = null;
	if (this.isLeapYear() == true)
		mnthAry= new Array(31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	else
		mnthAry= new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	
	return mnthAry[this.getMonth()];
}
/*
	iDayOfWeek is a number from 0-6, 0=Sun and 6=Sat
*/
Date.getWeekday = function(iDayOfWeek, bAbbreviation)
{
	var names = new Array("Sun", "Mon", "Tue", "Wed", "Thur", "Fri", "Sat");
	var namesFull = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
	if (iDayOfWeek < names.length)
		if (bAbbreviation)
			return names[iDayOfWeek];
		else
			return namesFull[iDayOfWeek];
	else
		return null;
}
Date.getMonthName = function(iMonth, bAbbreviation)
{
	var names = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
	var namesFull = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
	if (iMonth < names.length)
		if (bAbbreviation)
			return names[iMonth];
		else
			return namesFull[iMonth];
	else
		return null;
}
Number.tryParseInt = function(value)
{
	var numOut = new Number(0);
	try
	{
		var parVal = parseInt(value);
		if (isNaN(parVal) == false)
			numOut = parVal;
	}
	catch(ex)
	{
		numOut = new Number(0);
	}
	return numOut;
}

String.prototype.trim = function()
{
	var outVal = this.valueOf();
	var whitespace = new Array("\r", "\n", "\t", " ");
	for(var i=0; i<whitespace.length; i++)
	{
		var curChar = whitespace[i];
		outVal = outVal.replace(curChar, "");
	}

	return outVal;
}

String.format = function(format)
{
	for(var i=1; i<arguments.length; i++)
	{
		format = format.replace("{" + (i -1) + "}", arguments[i]);
	}

	return format;
}

String.formatEx = function(format, obj)
{
	for(var prop in obj)
	{
		var formatItem = "{" + prop + "}";
		if (format.indexOf(formatItem) > -1)
		{
			var objProperty = obj[prop];
			if (objProperty && objProperty != null)
			{
				format = format.replace(formatItem, objProperty.toString());
			}
			else
				format = format.replace(formatItem, "");
		}
	}
	
	return format;
}

//finds the index of a specified value, 
//returns: -1 of the value is not found otherwise the index in the array
Array.prototype.indexOf = function(value)
{
	var ret = -1;
	for(var idx = 0; idx < this.length; idx++)
	{
		if (this[idx] == value)
		{
			ret = idx;
			break;
		}
	}
	return ret;
}

/***************** DHTML related Scripts  *********************/
function SetNodeText(nodeElement, text)
{
	if (nodeElement && nodeElement.childNodes && text)
	{
		var new_txt = document.createTextNode(text);
		if (nodeElement.childNodes.length == 0)
			nodeElement.appendChild(new_txt);
		else
			nodeElement.replaceChild(new_txt, nodeElement.childNodes[0]);
	}
}

//returns the value of an input or the default
//value if the object is null
function GetInputValue(inputElement, defaultval)
{
	try
	{
		if (! inputElement || inputElement == null)
			inputElement.value = defaultval;
		else
			inputElement.value = value;
	}
	catch(ex)
	{
		inputElement.value = defaultval;	
	}
}

//set the value of an input to either the object value 
//or to empty if the object is null
function SetInputValue(inputElement, value, defaultval)
{
	try
	{
		if (value == null)
			inputElement.value = defaultval;
		else
		{
			inputElement.value = value;
		}
	}
	catch(ex)
	{
		inputElement.value = defaultval;	
	}
}
function SetChildTagsDisabled(theobj, tagname, isdisabled)
{
	if (theobj)
	{
	    var oChildren = theobj.getElementsByTagName(tagname);
	    for (var i = 0; i < oChildren.length; i++) 
	    {
            var child = oChildren[i];
            SetElementDisabled(child, isdisabled);
	    }
	}
}
function SetElementDisabled(theobj, isdisabled)
{
    theobj.disabled = isdisabled;
}

function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}

function findPosY(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;
	return curtop;
}
function GetTopLeftPosition(element)
{
    var oPos = new Object();
	oPos.x = 0;
    oPos.y = 0;

    while (element.offsetParent)
    {
        oPos.x += element.offsetLeft;
        oPos.y += element.offsetTop;
        element = element.offsetParent;
    }
	
    if (element.x) oPos.x = element.x;
    if (element.y) oPos.y = element.y;
    return oPos;
}
/* cross browser method to get the 
    exact mouse position.
*/
function getMousePosition(e)
{
	var oPos = new Object();
    oPos.x = 0;
	oPos.y = 0;
	if (e.pageX || e.pageY)
	{
		oPos.x = e.pageX;
		oPos.y = e.pageY;
	}
	else if (e.clientX || e.clientY)
	{
		oPos.x = e.clientX + document.body.scrollLeft;
		oPos.y = e.clientY + document.body.scrollTop;
	}

    return oPos;	
}
function getEventTarget(e)
{
    var targ;
    if (e.target) targ = e.target;
    else if (e.srcElement) targ = e.srcElement;
    if (targ.nodeType == 3) // defeat Safari bug
        targ = targ.parentNode;
    return targ;
}

function getScrollXY() 
{
    //courtesy of www.howtocreate.co.uk
    var scrollObj = new Object();
    scrollObj.x = 0;
    scrollObj.y = 0;
    
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrollObj.y = window.pageYOffset;
    scrollObj.x = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrollObj.y = document.body.scrollTop;
    scrollObj.x = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrollObj.y = document.documentElement.scrollTop;
    scrollObj.x = document.documentElement.scrollLeft;
  }
  return scrollObj;
}

function getAvailableSize()
{
    //courtesy of www.howtocreate.co.uk
    var sizeObj = new Object();
    sizeObj.height = 0;
    sizeObj.width = 0;

  if (typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    sizeObj.width = window.innerWidth;
    sizeObj.height = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    sizeObj.width = document.documentElement.clientWidth;
    sizeObj.height = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    sizeObj.width = document.body.clientWidth;
    sizeObj.height = document.body.clientHeight;
  }
  return sizeObj;
}
/* clearDefaultText is used onfocus on a textbox to clear the default text */
function clearDefaultText(evt, defaultText)
{
    evt = (evt) ? evt : ((window.event) ? window.event : "")
    if (evt)
    {
        var tgt = getEventTarget(evt);
        if (tgt != null && tgt != undefined)
        {
            if (tgt.value == defaultText)
                tgt.value = "";
        }
    }                            
}
/* restoreDefaultText is used onblur on a textbox to restore the default text */
function restoreDefaultText(evt, defaultText)
{
    evt = (evt) ? evt : ((window.event) ? window.event : "")
    if (evt)
    {
        var tgt = getEventTarget(evt);
        if (tgt != null && tgt != undefined)
        {
            if (tgt.value == "")
                tgt.value = defaultText;
        }
    }                            
}

// prevents more than "count" characters from being entered into a text box (single or multi-line)
// add this to the textarea  onkeyup="LimitCount(this,1000)" onchange="LimitCount(this,1000)"
function LimitCount(inputEl, count) {
    var maxlength = new Number(count); // Change number to your max length.
    if (inputEl.value.length > maxlength) {
        inputEl.value = inputEl.value.substring(0, maxlength);
    }
}