js判断ie6浏览器

//Pure JavaScript, no framework - NOTE: this must be placed in an onLoad event or after the body has loaded or it will result in an error
if(typeof document.body.style.maxHeight === "undefined") {
	alert('IE6 Detected');
}

//jQuery syntax - Note that the browser method is now deprecated in favor of feature detection through the support method
if (($.browser.msie) && ($.browser.version == "6.0")){
	alert('IE6 Detected');
}