判断是什么浏览器

/**
 *浏览器判断 
 */

function getExplorer() {
	var explorer = window.navigator.userAgent;
	if (isIE()){
		return "IE";
	}
	//firefox
	else if (explorer.indexOf("Firefox") >= 0) {
		return "Firefox";
	}
	//Chrome
	else if (explorer.indexOf("Chrome") >= 0) {
		return "Chrome";
	}
	//Opera
	else if (explorer.indexOf("Opera") >= 0) {
		return "Opera";
	}
	//Safari
	else if (explorer.indexOf("Safari") >= 0) {
		return "Safari";
	}
}

function isIE() { //ie?
    if (!!window.ActiveXObject || "ActiveXObject" in window)
        return true;
    else
        return false;
}