JS之正則表達式之郵箱和手機的校驗

<input type="text" placeholder="請輸入郵箱" id="email">
<input type="text" placeholder="請輸入手機" id="phone">

<script>
	email.onchange = function(){
		var email = this.value;
		//var reg = /^([a-zA-Z]|[0-9])(\w|\-)+@[a-zA-Z0-9]+\.([a-zA-Z]{2,4})$/;
        var reg = /^(\w-*\.*)+@(\w-?)+(\.\w{2,})+$/;
		if(reg.test(email)){
			alert("郵箱格式正確");
		}else{
			alert("郵箱格式不正確");
		}
	}

    function isPoneAvailable(val) {
        var myreg=/^[1][3,4,5,7,8][0-9]{9}$/;
        if (!myreg.test(val)) {
            return false;
        } else {
            return true;
        }
    }
</script>