js驗證連續兩位數字遞增或遞減和連續三位數字相同

時間 2019-12-11

原文原文鏈接

<!DOCTYPE html><html><head lang="en">    <meta charset="UTF-8">    <title></title></head><body><form method="post" class="form-horizontal" role="form" action="" id="myform">    <input id="testid" name="testid" value='' >    <button onclick="f($('#testid').val())" type="button" id="smsbtn" class="btn btn-success">驗證</button></form><script language="JavaScript">    function isPassword(){//連續三位數字相同        var str = $("#testid").val();        //var patrn=/(.)*(.)\2{2}(.)*/g;        var patrn = /(\w)*(\w)\2{2}(\w)*/g;        if (patrn.test(str)){            alert('ture') //verify false        }else{            alert('false'); //verify true        }    }    function f(a){ //連續2位數字遞增或遞減        //console.log(a);        if(a.length<2){            return alert('111');        }        var t=a.charCodeAt(0)-a.charCodeAt(1);        console.log(t);        for(var i=0;i<a.length-1;i++){            if((a.charCodeAt(i)-a.charCodeAt(i+1))==-1 || (a.charCodeAt(i)-a.charCodeAt(i+1))==1 ){                return alert('true') //verify  false            }else{                return alert('false') //verify true            }        }    }</script><script src="js/jquery-1.11.3.js"></script></body></html>

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