急字符串对比有关问题

急！！求救字符串对比问题
<script language="javascript">
function macAddress(){
   
//var macAddress ="";
if(new Boolean(network.ethernets[0])){
if(new Boolean(network.ethernets[0].MACAddress)) {
   
  var macAddress = network.ethernets[0].MACAddress.replace(/-/g, ""); //获取机顶盒mac地址
  var a="E8EA680302F3";//可访问的mac地址
   
  if(macAddress==a){
  window.location.href="http://10.43.38.12/xnw,0,sy.page";
  }
  else{
  window.location.href="http://10.43.38.12/Verification.jsp";
  }
  }  
}
  }
 
</script>
我弹出提示框macAddress的值就E8EA680302F3为什么就是不进if直接走else呢，电脑上没法跟，因为电脑没有mac地址，求高手解答

[解决办法]
var macAddress 难道不是字符串类型？
[解决办法]
var macAddress = network.ethernets[0].MACAddress.replace(/(^\s*|\s*$)/g,'');
去掉前后空格