JS judge verify the MAC address of the 2 instances

Method one:

var temp = /[A-Fa-f0-9]{2}:[A-Fa-f0-9]{2}:[A-Fa-f0-9]{2}:[A-Fa-f0-9]{2}:[A-Fa-f0-9]{2}:[A-Fa-f0-9]{2}/;
if (!temp.test(document.mac.value))
{
     return false;
}

function macFormCheck(mac)
{   
    var macs = new Array();
    macs = mac.split(":");

 
    if(macs.length != 6){
        alert(" The input of mac The address format is incorrect, please use xx:xx:xx:xx:xx:xx Form input ( xx for 16 Base number) !");//A web - based online tutorial http: s _yige.org/js/
        return false;
    }

 
    for (var s=0; s<6; s++) {
        var temp = parseInt(macs[s],16);

        if(isNaN(temp))
        {
            alert(" The input of mac The address format is incorrect, please use xx:xx:xx:xx:xx:xx Form input ( xx for 16 Base number) !");   
         return false;   
        }

 
           if(temp < 0 || temp > 255){
            alert(" The input of mac The address format is incorrect, please use xx:xx:xx:xx:xx:xx Form input ( xx for 16 Base number) !");   
         return false;   
     }
    }

 
    return true;
}