验证email格式

[javascript]代码库

//检查email是否正确
function check_email(thisObj) {
    var reg = /^([a-zA-Z\d][a-zA-Z0-9_]+@[a-zA-Z\d]+(\.[a-zA-Z\d]+)+)$/gi;
    var rzt = thisObj.value.match(reg);
    if (thisObj.value.length == 0) {
        document.getElementById('show_e').innerHTML = "Email不能为空";
        return false;
    } else {
        if (rzt == null) {
            document.getElementById('show_e').innerHTML = "Email地址不正确";
            return false;
        }
        document.getElementById('show_e').innerHTML = "";
        return true;
    }
    
}