function allinfo(){

var ua = navigator.userAgent;

ua = ua.toLowerCase();

var match = /(webkit)[ \/]([\w.]+)/.exec(ua) ||

/(opera)(?:.*version)?[ \/]([\w.]+)/.exec(ua) ||

/(msie) ([\w.]+)/.exec(ua) ||

!/compatible/.test(ua) && /(mozilla)(?:.*? rv:([\w.]+))?/.exec(ua) || [];

//如果需要获取浏览器版本号：match[2]

switch(match[1]){

case "msie": //ie

if (parseInt(match[2]) === 6){ //ie6

alert("ie6");

alert("暂时不支持IE7.0及以下版本浏览器，请升级您的浏览器版本！");

}

else if (parseInt(match[2]) === 7) { //ie7

alert("ie7");

//document.getElementById("hid").style.display = "none";

// document.getElementById("show").style.display = "block";

}

else if (parseInt(match[2]) === 8){ //ie8

alert("ie8");

}

else if(parseInt(match[2]) === 9){

alert("ie9");

//document.getElementById("hid").style.display = "none";

}

break;

case "webkit": //safari or chrome

//alert("safari or chrome");

// document.getElementById("middle").style.display = "none";

break;

case "opera": //opera

alert("opera");

break;

case "mozilla": //Firefox

alert("Firefox");

//document.getElementById("hid").style.display = "none";

break;

default:

break;

}

}