Validate phone numbers with jquery

var ismobile=/^ (?: 13d|15d) D{5} (D{3}|*{3}) $/;   
var isphone=/^ ((0d{2,3})-)? (d{7,8}) (-(D{3,}))? $/;
 if (! Ismobile.test (value to be validated) &&!isphone.test (value to be validated)) {
            alert ("Please fill in the phone number correctly, for example: 13415764179 or 0321-4816048");
            return false;
        }
 
<script>
 //var str = "+8615245678901";
 var str = "68836694";
 var str = "0100-68836694";
var Partten =/(^[0-9]{3,4}-[0-9]{3,8}$) | (^[0-9]{3,8}$) | (^ ([0-9]{3,4})
[0-9] {3,8}$) | (^0{0,1}13[0-9]{9}$)/;
var partten=/^ (?: +86)? (?: 13d|15d|18d) d{8}$/;  Mobile phone
 var partten=/^ (?:(?: 0 d{2,3})? (?:d {7,8}) (-(?:d {3,})) $/;  Fixed telephone
 alert (Str.match (Partten));
</script>