不兼容IE

function inspectPlugin(name){
    name = name.toLowerCase();
    for(var i=0;i<navigator.plugins.length;i++){
        if(navigator.plugins[i].name.toLowerCase().indexOf(name) > -1){
            return "浏览器安装"+name
        }
    }
    return "请安装"+name
}
console.log(inspectPlugin("flash"));