mysqlbinlog: unknown variable 'default-character-set=utf8' 解决方法

String.prototype.trim =  function() {return this.replace(/^\s+|\s+$/g,"");}
function checkTel() {
var  area_code = document.getElementById("area_code").value.trim();
var  main_code = document.getElementById("main_code").value.trim();
var  ext_code = document.getElementById("ext_code").value.trim();

var telephone = "";
if(/^\d{7,8}$/.test(main_code)) {
if(!(/^\d{3,4}$/.test(area_code))) {
alert("您的区号填写有误,区号应该是3~4位的数字!");
return;
}
telephone = area_code+ "-" + main_code ;
if(ext_code!= "") {
telephone += "-" + ext_code;
}
}
document.getElementById("telephone").value = telephone;
}