function _hasRequiredBrowser(){
var _agt = navigator.userAgent.toLowerCase();
var _ver = navigator.appVersion.toLowerCase();
var _isWin = (_ver.indexOf("win") != -1) ? true : false;
var _isMac = (_agt.indexOf("mac") != -1) ? true : false;
var _isIE  = (_ver.indexOf("msie") != -1) ? true : false;
var _isOpera = (_agt.indexOf("opera") != -1) ? true : false;
	var b = false;
	// ie5+
	if(_isIE && !_isMac){
		var tmp = _ver.split("msie");
		var ieVer = parseFloat(tmp[1]);
		if(ieVer >= 5.0) b = true;
	}
	// safari
	else if(_isMac){ 
	  if(parseInt(navigator.appVersion)>=5) b = true;
	}
	return b;
}


// plug -in detection script by Macromedia
function JSGetSwfVer(i){
var _agt = navigator.userAgent.toLowerCase();
var _ver = navigator.appVersion.toLowerCase();
var _isWin = (_ver.indexOf("win") != -1) ? true : false;
var _isMac = (_agt.indexOf("mac") != -1) ? true : false;
var _isIE  = (_ver.indexOf("msie") != -1) ? true : false;
var _isOpera = (_agt.indexOf("opera") != -1) ? true : false;
	if (navigator.plugins != null && navigator.plugins.length > 0){
		if (navigator.plugins["Shockwave Flash 2.0"] || navigator.plugins["Shockwave Flash"]) {
			var swVer2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
      		var flashDescription = navigator.plugins["Shockwave Flash" + swVer2].description;
			descArray = flashDescription.split(" ");
			tempArrayMajor = descArray[2].split(".");
			versionMajor = tempArrayMajor[0];
			versionMinor = tempArrayMajor[1];
			if ( descArray[3] != "" ) {
				tempArrayMinor = descArray[3].split("r");
			} else {
				tempArrayMinor = descArray[4].split("r");
			}
      		versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;
            flashVer = versionMajor + "." + versionMinor + "." + versionRevision;
      	} else {
			flashVer = -1;
		}
	}
	else {
		flashVer = -1;
	}
	return flashVer;
}


function _hasFlashPlugin(reqMajorVer, reqMinorVer, reqRevision){
var _agt = navigator.userAgent.toLowerCase();
var _ver = navigator.appVersion.toLowerCase();
var _isWin = (_ver.indexOf("win") != -1) ? true : false;
var _isMac = (_agt.indexOf("mac") != -1) ? true : false;
var _isIE  = (_ver.indexOf("msie") != -1) ? true : false;
var _isOpera = (_agt.indexOf("opera") != -1) ? true : false;
 	reqVer = parseFloat(reqMajorVer + "." + reqRevision);
	for (i=25;i>0;i--) {	
		if (_isIE && _isWin && !_isOpera){
			versionStr = VBGetSwfVer(i);
		} else {
			versionStr = JSGetSwfVer(i);		
		}
		if (versionStr == -1 ){ 
			return false;
		} else if (versionStr != 0) {
			if(_isIE && _isWin && !_isOpera){
				tempArray = versionStr.split(" ");
				tempString = tempArray[1];
				versionArray = tempString .split(",");				
			} else {
				versionArray = versionStr.split(".");
			}
			versionMajor = versionArray[0];
			versionMinor = versionArray[1];
			versionRevision = versionArray[2];
			
			versionString = versionMajor + "." + versionRevision;   // 7.0r24 == 7.24
			versionNum = parseFloat(versionString);
			if ( (versionMajor > reqMajorVer) && (versionNum >= reqVer) ){
				return true;
			} else {
				return ((versionNum >= reqVer && versionMinor >= reqMinorVer) ? true : false );	
			}
		}
	}
}

function checkBrowser() {
  if(_hasFlashPlugin(8, 0, 0)){
    document.getElementById("htmlPage").style.display = "none";
  }else{
    document.getElementById("flashPage").style.display = "none";
  }
}

function loadImg() {
	switch(Math.floor(Math.random() * 3)+1) {
		case 1:
		document.write("<img src=\"images/logo1.jpg\">");
		break;
		case 2:
		document.write("<img src=\"images/logo2.jpg\">");
		break;
		case 3:
		default:
		document.write("<img src=\"images/logo3.jpg\">");
		break;
	}
	
}