function msieversion()
{
	var ua = window.navigator.userAgent;
	var msie = ua.indexOf("MSIE");
	if(msie > 0) return parseInt(ua.substring(msie+5,ua.indexOf(".",msie)));
	else return 0;
}


function checkIEVersion()
{
	var iever = msieversion();
	if(iever < 6){
		alert("ÇëʹÓÃMicrosoft Internet Explore6.0£¡");
		return false;
	}//
	return true;
}