function checkIE()
{
	var bRes = false;
	var platform = window.navigator.platform;
	if( platform == "Win32" ){
		var agent = window.navigator.appVersion;
		var nPMSIE = agent.indexOf("MSIE");
		var nPSEMI = agent.indexOf(";",nPMSIE);
		var strVersion = agent.substring(nPMSIE+5,nPSEMI);
		if( parseFloat(strVersion) >= 5.5 ){
			bRes = true;
		}
	}
	return bRes;
}