廢話不多說了，直接給大家貼代碼了，具體代碼如下所示：

checkpassword = function(v){var numasc = 0;var charasc = 0;var otherasc = 0;if(0==v.length){return "密碼不能為空";}else if(v.length<8||v.length>12){return "密碼至少8個字符,最多12個字符";}else{for (var i = 0; i < v.length; i++) {var asciiNumber = v.substr(i, 1).charCodeAt();if (asciiNumber >= 48 && asciiNumber <= 57) {numasc += 1;}if ((asciiNumber >= 65 && asciiNumber <= 90)||(asciiNumber >= 97 && asciiNumber <= 122)) {charasc += 1;}if ((asciiNumber >= 33 && asciiNumber <= 47)||(asciiNumber >= 58 && asciiNumber <= 64)||(asciiNumber >= 91 && asciiNumber <= 96)||(asciiNumber >= 123 && asciiNumber <= 126)) {otherasc += 1;}}if(0==numasc) {return "密碼必須含有數(shù)字";}else if(0==charasc){return "密碼必須含有字母";}else if(0==otherasc){return "密碼必須含有特殊字符";}else{return true;}}};

以上所述是小編給大家介紹的JS 驗證密碼 不能為空，必須含有數(shù)字、字母、特殊字符,長度在8-12位，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對錯新站長站網(wǎng)站的支持！