手机号验证js

html代码：

<div class="reg_con" style="position:relative;">

<label>联系电话</label>

<input id="telphone" type="text" name="userExt.telphone" value="13800000000"         class="inp" maxlength="11" />

<div id="telphone_tip" style="position:absolute; right:-90px;top:20px; color:#c00;         font-weight:bold;">

</div>

</div>

JS代码：

$("#telphone").blur("blur",function(){

var telphone = $("#telphone").val();

var myreg = /^1[34578]\d{9}$/;

if(telphone == ""){

$("#telphone_tip").html("联系电话不能为空");

}

else

{

if(myreg.test(telphone)){

$("#telphone_tip").html("");

}

else

{

$("#telphone_tip").html("联系电话格式不正确");

};

};

});