提交表单前确认信息

Question

我正在验证表格，然后通过 javascript 要求确认... 所以在提交时我调用了两个函数名称 validate() & make_confirm()..

onsubmit="return(validate() && show_alert(this));"

通过这个我可以部分地调用这两个函数但是确认部分不能正常工作我必须将它重定向到另一个页面同时按确定但是它不去请帮助我

validate & make_sure() 函数如下：

function validate() {
           if(document.getElementById('cname').value == '')
            {
                alert('Please enter your name');
                document.getElementById('cname').focus();
                return false;
            }
            else if(document.getElementById('address').value == '')
            {
                alert('Please enter your address');
                document.getElementById('address').focus();
                return false;
            }
            else if(document.getElementById('city').value == '')
            {
                alert('Please choose your city');
                document.getElementById('city').focus();
                return false;
            }
            else if(document.getElementById('state').value == '')
            {
                alert('Please enter your state');
                document.getElementById('state').focus();
                return false;
            }
function make_sure() {
          if(confirm("Do you really want to do this?"))
            document.forms[0].submit();
          else
            return false;
        }

Answer 1

使用一个函数来验证和确认并设置表单的 action 以将当前页面重定向到另一页面。

function validateAndConfirm() {
    if( isEmpty(id('cname').value) ) {
        alert('Please enter your name');
        id('cname').focus();
        return false;
    }
    else if( isEmpty(id('address').value) ) {
        alert('Please enter your address');
        id('address').focus();
        return false;
    }
    else if( isEmpty(id('city').value) ) {
        alert('Please choose your city');
        document.getElementById('city').focus();
        return false;
    }
    else if( isEmpty(id('state').value) ) {
        alert('Please enter your state');
        id('state').focus();
        return false;
    } else {
        if(confirm("Do you really want to do this?")) {
            document.forms[0].submit();
        }
        else {
            return false;
        }
    }
}

function isEmpty(val){
    return (typeof val == 'undefined' || val === undefined || val == null || val.length <= 0) ? true : false;
}

// this function help to simplify you writing : document.getElementById to just id
function id(sid){
   return document.getElementById(sid);
}

提交表单前确认信息

Confirm msg before submitting a form

javascript

onsubmit