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;  

}  

   

}