JS 验证密码 不能为空，必须含有数字、字母、特殊字符,长度在8-12位

1.checkpassword = function(v){  2.    var numasc = 0;  3.        var charasc = 0;  4.        var otherasc = 0;  5.        if(0==v.length){  6.            return "密码不能为空";  7.        }else if(v.length<8||v.length>12){  8.            return "密码至少8个字符,最多12个字符";  9.        }else{  10.            for (var i = 0; i < v.length; i++) {  11.                var asciiNumber = v.substr(i, 1).charCodeAt();  12.                if (asciiNumber >= 48 && asciiNumber <= 57) {  13.                    numasc += 1;  14.                }  15.                if ((asciiNumber >= 65 && asciiNumber <= 90)||(asciiNumber >= 97 && asciiNumber <= 122)) {  16.                    charasc += 1;  17.                }  18.                if ((asciiNumber >= 33 && asciiNumber <= 47)||(asciiNumber >= 58 && asciiNumber <= 64)||(asciiNumber >= 91 && asciiNumber <= 96)||(asciiNumber >= 123 && asciiNumber <= 126)) {  19.                    otherasc += 1;  20.                }  21.            }  22.            if(0==numasc)  {  23.                return "密码必须含有数字";  24.            }else if(0==charasc){  25.                return "密码必须含有字母";  26.            }else if(0==otherasc){  27.                return "密码必须含有特殊字符";  28.            }else{  29.                return true;  30.            }  31.        }  32.};