JS 判断手机号码和座机

function yanzhengdh(){
//判断座机格式 
var partten = /^(\d{3,4}\-)?\d{7,8}$/;   

var zuoji=partten.test(document.getElementById("dianhua").value);  
//判断手机格式  
var re = /^1[35]\d{9}$/;  
var shouji=re.test(document.getElementById("dianhua").value);  
if(zuoji || shouji){  
   
}else{  
 document.getElementById("dianhua_msg").innerHTML = "<font color='#FF0000'>联系电话格式不正确</font>";
 document.getElementById("dianhua").focus();  
 return false;  
}  
   
}