Regular phone number

var ver_phone = /^1[3|4|5|8|7][0-9]\d{8}$/;// phone verification

Then judge whether it meets 11 digits.

function checkMobile(){ 
 var sMobile = document.mobileform.mobile.value 
 if(!(/^1[3|4|5|8][0-9]\d{4,8}$/.test(sMobile))){ 
  alert("不是完整的11位手机号或者正确的手机号前七位"); 
  document.mobileform.mobile.focus(); 
  return false; 
 } 
} 

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