jQuery 密码验证 字母加数字或符号的组合密码，不能单独使用数字、字母或字符

function validPsw() {
var password = $(".password").val();
var num = 0;
var number = 0 ;
var letter = 0 ;
var bigLetter = 0 ;
var chars = 0 ;

if (password.search(/[0-9]/) != -1) {
num += 1;
number =1;
}
if (password.search(/[A-Z]/) != -1) {
num += 1;
bigLetter = 1 ;
}
if (password.search(/[a-z]/) != -1) {
num += 1;
letter = 1 ;
}
if (password.search(/[^A-Za-z0-9]/) != -1) {
num += 1;
chars = 1 ;
}
if (num >= 2 && (password.length >= 6 && password.length <= 16)) {
$(".pswSpan").html("");
$(".password").css("border","#B0B0B0 solid 1px");
}else if(password.length < 6 || password.length > 16){
$(".pswSpan").html("密码由6-16个字符组成!");
$(".password").css("border","#B35D5D solid 1px");
}else if(num == 1){
if(number==1){
$(".pswSpan").html("不能全为数字!");
}
if(letter==1){
$(".pswSpan").html("不能全为字母!");
}
if(bigLetter==1){
$(".pswSpan").html("不能全为字母!");
}
if(chars==1){
$(".pswSpan").html("不能全为字符!");
}
$(".password").css("border","#B35D5D solid 1px");
}
}