复制代码 代码如下:

var isIE=!!window.ActiveXObject;

var isIE6=isIE&&!window.XMLHttpRequest;

var isIE8=isIE&&!!document.documentMode;

var isIE7=isIE&&!isIE6&&!isIE8;

if (isIE){

if (isIE6){

alert("ie6");

}else if (isIE8){

alert("ie8");

}else if (isIE7){

alert("ie7");

}

}

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复制代码 代码如下:

if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/6./i)=="6."){

alert("IE 6");

}

else if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/7./i)=="7."){

alert("IE 7");

}

else if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/8./i)=="8."){

alert("IE 8");

}

else if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/9./i)=="9."){

alert("IE 9");

}

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复制代码 代码如下:

if(navigator.userAgent.indexOf("Opera") != -1) {

alert('Opera');

}

else if(navigator.userAgent.indexOf("MSIE") != -1) {

alert('Internet Explorer');

}

else if(navigator.userAgent.indexOf("Firefox") != -1) {

alert('Firefox');

}

else if(navigator.userAgent.indexOf("Netscape") != -1) {

alert('Netscape');

}

else if(navigator.userAgent.indexOf("Safari") != -1) {

alert('Safari');

}

else{

alert('无法识别的浏览器。');

}

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复制代码 代码如下:

if(!+'v1' && !'1'[0]){

alert("ie6或ie7")

}