function check(str){
return (/[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890]+/).test(str);
}
return (/[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890]+/).test(str);
}
function isMatch(str){
return /[0-9\uff21-\uff3a\uff41-\uff5a]+/.test(str);
}