//判断是否是IE浏览器，包括Edge浏览器  
function IEVersion()  
{  
    var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串  
    var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器
    var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器  
	var isEdge = userAgent.indexOf("Windows NT 6.1; Trident/7.0;") > -1 && !isIE; //判断是否IE的Edge浏览器  
    if(isIE)  
    {  
        var reIE = new RegExp("MSIE (\\d+\\.\\d+);");  
        reIE.test(userAgent);  
        var fIEVersion = parseFloat(RegExp["$1"]);  
        if(fIEVersion == 7)  
        { return "IE7";}  
        else if(fIEVersion == 8)  
        { return "IE8";}  
        else if(fIEVersion == 9)  
        { return "IE9";}  
        else if(fIEVersion == 10)  
        { return "IE10";}  
        else if(fIEVersion == 11)  
        { return "IE11";}  
        else  
        { return "0"}//IE版本过低  
    }  
	else if(isEdge)  
	{  
    	return "Edge";  
	}  
    else  
    {  
        return "-1";//非IE  
    }  
}