var EventUtil = new Object;
	EventUtil.addEventHandler = function (oTarget, sEventType, fnHandler) {
	    if (oTarget.addEventListener) {
	        oTarget.addEventListener(sEventType, fnHandler, false);
	    } else if (oTarget.attachEvent) {
	        oTarget.attachEvent("on" + sEventType, fnHandler);
	    } else {
	        oTarget["on" + sEventType] = fnHandler;
	    }
	};
	        
	EventUtil.removeEventHandler = function (oTarget, sEventType, fnHandler) {
	    if (oTarget.removeEventListener) {
	        oTarget.removeEventListener(sEventType, fnHandler, false);
	    } else if (oTarget.detachEvent) {
	        oTarget.detachEvent("on" + sEventType, fnHandler);
	    } else { 
	        oTarget["on" + sEventType] = null;
	    }
	};
	
	EventUtil.formatEvent = function (oEvent) {
	    if (isIE && isWin) {
	        oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
	        oEvent.eventPhase = 2;
	        oEvent.isChar = (oEvent.charCode > 0);
	        oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
	        oEvent.pageY = oEvent.clientY + document.body.scrollTop;
	        oEvent.preventDefault = function () {
	            this.returnValue = false;
	        };
	
	        if (oEvent.type == "mouseout") {
	            oEvent.relatedTarget = oEvent.toElement;
	        } else if (oEvent.type == "mouseover") {
	            oEvent.relatedTarget = oEvent.fromElement;
	        }
	
	        oEvent.stopPropagation = function () {
	            this.cancelBubble = true;
	        };
	
	        oEvent.target = oEvent.srcElement;
	        oEvent.time = (new Date).getTime();
	    }
	    return oEvent;
	};
	
	EventUtil.getEvent = function() {
	    if (window.event) {
	        return this.formatEvent(window.event);
	    } else {
	    	var func = EventUtil.getEvent.caller;
			while (func != null) {
				var arg0 = func.arguments[0];
				if(arg0 && typeof(arg0) == 'object' && arg0.type && arg0.target && arg0.preventDefault && arg0.stopPropagation) {
					return arg0;
				}
				func = func.caller;
			}
	    	return null;
	    }
	};
	
	var sUserAgent = navigator.userAgent;
	var fAppVersion = parseFloat(navigator.appVersion);
	
	function compareVersions(sVersion1, sVersion2) {
	
	    var aVersion1 = sVersion1.split(".");
	    var aVersion2 = sVersion2.split(".");
	    
	    if (aVersion1.length > aVersion2.length) {
	        for (var i=0; i < aVersion1.length - aVersion2.length; i++) {
	            aVersion2.push("0");
	        }
	    } else if (aVersion1.length < aVersion2.length) {
	        for (var i=0; i < aVersion2.length - aVersion1.length; i++) {
	            aVersion1.push("0");
	        }    
	    }
	    
	    for (var i=0; i < aVersion1.length; i++) {
	 
	        if (aVersion1[i] < aVersion2[i]) {
	            return -1;
	        } else if (aVersion1[i] > aVersion2[i]) {
	            return 1;
	        }    
	    }
	    
	    return 0;
	
	}
	
	var isOpera = sUserAgent.indexOf("Opera") > -1;
	var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;
	
	if (isOpera) {
	    var fOperaVersion;
	    if(navigator.appName == "Opera") {
	        fOperaVersion = fAppVersion;
	    } else {
	        var reOperaVersion = new RegExp("Opera (\\d+\\.\\d+)");
	        reOperaVersion.test(sUserAgent);
	        fOperaVersion = parseFloat(RegExp["$1"]);
	    }
	
	    isMinOpera4 = fOperaVersion >= 4;
	    isMinOpera5 = fOperaVersion >= 5;
	    isMinOpera6 = fOperaVersion >= 6;
	    isMinOpera7 = fOperaVersion >= 7;
	    isMinOpera7_5 = fOperaVersion >= 7.5;
	}
	
	var isKHTML = sUserAgent.indexOf("KHTML") > -1 
	              || sUserAgent.indexOf("Konqueror") > -1 
	              || sUserAgent.indexOf("AppleWebKit") > -1; 
	              
	var isMinSafari1 = isMinSafari1_2 = false;
	var isMinKonq2_2 = isMinKonq3 = isMinKonq3_1 = isMinKonq3_2 = false;
	
	if (isKHTML) {
	    isSafari = sUserAgent.indexOf("AppleWebKit") > -1;
	    isKonq = sUserAgent.indexOf("Konqueror") > -1;
	
	    if (isSafari) {
	        var reAppleWebKit = new RegExp("AppleWebKit\\/(\\d+(?:\\.\\d*)?)");
	        reAppleWebKit.test(sUserAgent);
	        var fAppleWebKitVersion = parseFloat(RegExp["$1"]);
	
	        isMinSafari1 = fAppleWebKitVersion >= 85;
	        isMinSafari1_2 = fAppleWebKitVersion >= 124;
	    } else if (isKonq) {
	
	        var reKonq = new RegExp("Konqueror\\/(\\d+(?:\\.\\d+(?:\\.\\d)?)?)");
	        reKonq.test(sUserAgent);
	        isMinKonq2_2 = compareVersions(RegExp["$1"], "2.2") >= 0;
	        isMinKonq3 = compareVersions(RegExp["$1"], "3.0") >= 0;
	        isMinKonq3_1 = compareVersions(RegExp["$1"], "3.1") >= 0;
	        isMinKonq3_2 = compareVersions(RegExp["$1"], "3.2") >= 0;
	    } 
	    
	}
	
	var isIE = sUserAgent.indexOf("compatible") > -1 
	           && sUserAgent.indexOf("MSIE") > -1
	           && !isOpera;
	           
	var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = false;
	
	if (isIE) {
	    var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
	    reIE.test(sUserAgent);
	    var fIEVersion = parseFloat(RegExp["$1"]);
	
	    isMinIE4 = fIEVersion >= 4;
	    isMinIE5 = fIEVersion >= 5;
	    isMinIE5_5 = fIEVersion >= 5.5;
	    isMinIE6 = fIEVersion >= 6.0;
	}
	
	var isMoz = sUserAgent.indexOf("Gecko") > -1
	            && !isKHTML;
	
	var isMinMoz1 = sMinMoz1_4 = isMinMoz1_5 = false;
	
	if (isMoz) {
	    var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
	    reMoz.test(sUserAgent);
	    isMinMoz1 = compareVersions(RegExp["$1"], "1.0") >= 0;
	    isMinMoz1_4 = compareVersions(RegExp["$1"], "1.4") >= 0;
	    isMinMoz1_5 = compareVersions(RegExp["$1"], "1.5") >= 0;
	}
	
	var isNS4 = !isIE && !isOpera && !isMoz && !isKHTML 
	            && (sUserAgent.indexOf("Mozilla") == 0) 
	            && (navigator.appName == "Netscape") 
	            && (fAppVersion >= 4.0 && fAppVersion < 5.0);
	
	var isMinNS4 = isMinNS4_5 = isMinNS4_7 = isMinNS4_8 = false;
	
	if (isNS4) {
	    isMinNS4 = true;
	    isMinNS4_5 = fAppVersion >= 4.5;
	    isMinNS4_7 = fAppVersion >= 4.7;
	    isMinNS4_8 = fAppVersion >= 4.8;
	}
	
	var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
	var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") 
	            || (navigator.platform == "Macintosh");
	
	var isUnix = (navigator.platform == "X11") && !isWin && !isMac;
	
	var isWin95 = isWin98 = isWinNT4 = isWin2K = isWinME = isWinXP = false;
	var isMac68K = isMacPPC = false;
	var isSunOS = isMinSunOS4 = isMinSunOS5 = isMinSunOS5_5 = false;
	
	if (isWin) {
	    isWin95 = sUserAgent.indexOf("Win95") > -1 
	              || sUserAgent.indexOf("Windows 95") > -1;
	    isWin98 = sUserAgent.indexOf("Win98") > -1 
	              || sUserAgent.indexOf("Windows 98") > -1;
	    isWinME = sUserAgent.indexOf("Win 9x 4.90") > -1 
	              || sUserAgent.indexOf("Windows ME") > -1;
	    isWin2K = sUserAgent.indexOf("Windows NT 5.0") > -1 
	              || sUserAgent.indexOf("Windows 2000") > -1;
	    isWinXP = sUserAgent.indexOf("Windows NT 5.1") > -1 
	              || sUserAgent.indexOf("Windows XP") > -1;
	    isWinNT4 = sUserAgent.indexOf("WinNT") > -1 
	              || sUserAgent.indexOf("Windows NT") > -1 
	              || sUserAgent.indexOf("WinNT4.0") > -1 
	              || sUserAgent.indexOf("Windows NT 4.0") > -1 
	              && (!isWinME && !isWin2K && !isWinXP);
	} 
	
	if (isMac) {
	    isMac68K = sUserAgent.indexOf("Mac_68000") > -1 
	               || sUserAgent.indexOf("68K") > -1;
	    isMacPPC = sUserAgent.indexOf("Mac_PowerPC") > -1 
	               || sUserAgent.indexOf("PPC") > -1;  
	}
	
	if (isUnix) {
	    isSunOS = sUserAgent.indexOf("SunOS") > -1;
	
	    if (isSunOS) {
	        var reSunOS = new RegExp("SunOS (\\d+\\.\\d+(?:\\.\\d+)?)");
	        reSunOS.test(sUserAgent);
	        isMinSunOS4 = compareVersions(RegExp["$1"], "4.0") >= 0;
	        isMinSunOS5 = compareVersions(RegExp["$1"], "5.0") >= 0;
	        isMinSunOS5_5 = compareVersions(RegExp["$1"], "5.5") >= 0;
	    }
	}