function getElementsByClassName(_className)
{
	var _classArray = [];
	var _regExp = new RegExp('\\b' + _className + '\\b');
	var _getAllTags = document.getElementsByTagName('*');
	for(var i = 0; i < _getAllTags.length; i++)
	{
		if (_regExp.test(_getAllTags[i].className) == true)
		{
			_classArray.push(_getAllTags[i]);
		}
	}

	return _classArray;
}

document.getElementsByClassName = getElementsByClassName;

/*
 *	The following function code and comments are largerly based on some code found somewhere on the Web.
 */
function getElementRect( xoObj ) {

    var oRetval = new Rect();
    var bFixBrowserQuirks = true;
    var oOffsetParent = null;

    oOffsetParent = xoObj.offsetParent;
    var oOriginalObject = xoObj;
    var oElement = xoObj;

    while ( oElement.parentNode != null ) {
        oElement = oElement.parentNode;

        if ( oElement.offsetParent==null ) {
        }
        else {
            var bConsiderScroll = true;
            /*
		     *      In Opera, if parentNode of the first object is scrollable, then offsetLeft/offsetTop already
		     *      take its scroll position into account. If elements further up the chain are scrollable, their
		     *      scroll offsets still need to be added in. And for some reason, TR nodes have a scrolltop value
		     *      which must be ignored.
             */
            if ( bFixBrowserQuirks && window.opera ) {
                if ( oElement==oOriginalObject.parentNode || oElement.nodeName=="TR" ) {
					bConsiderScroll = false;
                }
            }
            if ( bConsiderScroll ) {
                if ( oElement.scrollTop && oElement.scrollTop>0 ) {
                    oRetval.Top -= oElement.scrollTop;
                }
                if ( oElement.scrollLeft && oElement.scrollLeft>0 ) {
                    oRetval.Left -= oElement.scrollLeft;
                }
            }
        }
        // If this node is also the offsetParent, add on the offsets and reset to the new offsetParent
        if ( oElement == oOffsetParent ) {
            oRetval.Left += xoObj.offsetLeft;
            if ( oElement.clientLeft && oElement.nodeName != "TABLE" ) {
                oRetval.Left += oElement.clientLeft;
            }
            oRetval.Top += xoObj.offsetTop;
            if ( oElement.clientTop && oElement.nodeName != "TABLE" ) {
                oRetval.Top += oElement.clientTop;
            }
            xoObj = oElement;
            if ( xoObj.offsetParent==null ) {
                if ( xoObj.offsetLeft ) {
                    oRetval.Left += xoObj.offsetLeft;
                }
                if ( xoObj.offsetTop ) {
                    oRetval.Top += xoObj.offsetTop;
                }
            }
            oOffsetParent = xoObj.offsetParent;
        }
    }

    if ( oOriginalObject.offsetWidth ) {
        oRetval.Width = oOriginalObject.offsetWidth;
    }
    if ( oOriginalObject.offsetHeight ) {
        oRetval.Height = oOriginalObject.offsetHeight;
    }
    return oRetval;
}

function Rect() {
    this.Top = 0;
    this.Left = 0;
    this.Width = 0;
    this.Height = 0;
}

function addClass( xoElement, xstrClass ) {
	if ( xoElement != null && xoElement != undefined ) {
		var strClass = null;
		if ( xoElement.className != undefined ) {
			strClass = xoElement.className
		} else {
			strClass = "";
		}

		var lstrClasses = strClass.split( " " );
		var bFound = false;
		for ( var i = 0; i < lstrClasses.length; i++ ) {
			if ( iCompare( lstrClasses[ i ], xstrClass ) ) {
				bFound = true;
				break;
			}
		}
		if ( !bFound ) {
			lstrClasses[ lstrClasses.length ] = xstrClass;
		}

		xoElement.className = lstrClasses.join( " " );
	}
}

function removeClass( xoElement, xstrClass ) {
	if ( xoElement != null && xoElement != undefined ) {
		var strClass = null;
		if ( xoElement.className != undefined ) {
			strClass = xoElement.className
		} else {
			strClass = "";
		}

		var lstrClasses = strClass.split( " " );
		var bFound = false;
		for ( var i = 0; i < lstrClasses.length; i++ ) {
			if ( iCompare( lstrClasses[ i ], xstrClass ) ) {
				bFound = true;
				lstrClasses[ i ] = "";
				break;
			}
		}
		xoElement.className = lstrClasses.join( " " );
	}
}

function isClass( xoElement, xstrClass ) {
	var bRetval = false;
	if ( xoElement != null && xoElement != undefined ) {
		var strClass = null;
		if ( xoElement.className != undefined ) {
			strClass = xoElement.className
		} else {
			strClass = "";
		}

		var lstrClasses = strClass.split( " " );
		for ( var i = 0; i < lstrClasses.length; i++ ) {
			if ( iCompare( lstrClasses[ i ], xstrClass ) ) {
				bRetval = true;
				break;
				lstrClasses[ i ] = "";
			}
		}
	}

	return bRetval;
}

function iCompare( xStr1, xStr2 ) {
	return ( ( xStr1.toLowerCase() ) == ( xStr2.toLowerCase() ) );
}

function addRemoveClassTest() {
	var oElement = document.getElementById( "index" );
	oElement.className = SELECTED;
	var strClass = oElement.className;
	addClass( oElement, "goofy" );
	removeClass( oElement, "goofy" );
	alert( "removed 'goofy from "+oElement.id+". Now class is: "+strClass );
}

function GTEvent( xoEvt ) {
	this.Element = null;
	this.Event = xoEvt;
	if ( !xoEvt )
		this.Event = window.event;
	if ( this.Event.target ) {
		this.Element = this.Event.target;
	} else if ( this.Event.srcElement ) {
		this.Element = this.Event.srcElement;
	}
	if ( this.Element.nodeType == 3 ) // workaround for Safari bug
		this.Element = this.Element.parentNode;
}

function trim( xstrText ) {
	xstrText = "   "+xstrText;
	while ( isSpace( xstrText.charAt( 0 ) ) ) {
		xstrText = xstrText.substring( 1, xstrText.length );
	}
	while ( isSpace( xstrText.charAt( xstrText.length-1 ) ) ) {
		xstrText = xstrText.substring( 0, xstrText.length-1 );
	}
	return xstrText;
}

function removeDuplicateSpaces( xstrText ) {
	var ch = '';
	var bSpace = false;
	var strText = "";
	for ( var i = 0; i < xstrText.length; i++ ) {
		ch = xstrText.charAt( i );
		if ( isSpace( ch ) ) {
			if ( !bSpace ) {
				strText += ' ';
			}
			bSpace = true;
		} else {
			bSpace = false;
			strText += ch;
		}
	}
	return strText;
}

function isSpace( xChar ) {
	return ( xChar == ' ' || xChar == '\r' || xChar == '\n' || xChar == '\t' ) ? true : false;
}

function getPosition( xObj ) {
	var left = 0;
	var top = 0;
	var width = 0;
	var height = 0;
	var parentNode = null;
	var offsetParent = null;
	var oElement = xObj;

	offsetParent = oElement.offsetParent;
	var originalObject = oElement;
	var oCurrent = oElement;

	while( oCurrent.parentNode != null ) {
		oCurrent = oCurrent.parentNode;
		if ( oCurrent.offsetParent == null ) {
		} else {
		}
		if ( oCurrent == offsetParent ) {
			left += oElement.offsetLeft;
			if ( oCurrent.clientLeft && oCurrent.nodeName!="TABLE" ) {
				left += oCurrent.clientLeft;
			}
			top += oElement.offsetTop;
			if ( oCurrent.clientTop && oCurrent.nodeName!="TABLE" ) {
				top += oCurrent.clientTop;
			}
			oElement = oCurrent;
			if ( oElement.offsetParent == null ) {
				if ( oElement.offsetLeft ) {
					left += oElement.offsetLeft;
				}
				if ( oElement.offsetTop ) {
					top += oElement.offsetTop;
				}
			}
			offsetParent = oElement.offsetParent;
		}
	}

	return new Position( left, top );
}

function Position( xLeft, xTop ) {
	this.left = xLeft;
	this.top = xTop;
}

function Dimension( xWidth, xHeight ) {
	this.width = xWidth;
	this.height = xHeight;
}

function display( xObj, xTop, xLeft ) {
	alert( xObj.id+"( "+xTop+", "+xLeft+" )" );
}

/**
 * The following code has been taken from http://www.quirksmode.org/js/detect.html
 */
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};