Question

Hy I need to check if the given phone area code is correct. i created a input field, user can insert a tel area code like 0044 oder 0090 and so on. I restricted the input field to 4 chars. I need to check after the 4 chars are entered if the area code is correct.

What it should do. After entering 4 number, the script should check the following things. Does the entered number equals something like "00{number 2 digit only}" if it doesnt alert("please enter correct tel areacode");

I hope i could explain my problem clear. How can i do it with javascript or jquery?

Answer 1

是否“0”有效区域代码? 它有“00”,后面有两位数......但我假定这些代码为0,然后是10或10个以上。

$( input.phone ).keyup( function(){
  var num = $(this).val(), i = parseInt(num, 10), valid = true;
  if(num.length==4 && (i<9 || i>99) ){
    //phone number is invalid
  }
});

但我认为,模糊事件在这方面会更有用,因为如果他只打了三位数,上述功能就没有通知用户。一旦重点移除投入箱,通知将尽快发出,而第四位数则不在此列。因此,我的建议是:

$( input.phone ).blur( function(){
  var num = $(this).val(), i = parseInt(num, 10), valid = true;
  if(num.length != 4 || i<9 || i>99 ){
    //phone number is invalid, notify the user
  }
});

http://www.ohchr.org。我认为,你重新确认与贵方特有的某种区域守则。如果你想要确认国际电话码,你不妨查看这个名单:http://en.wikipedia.org/wiki/List_of_country_questing_codes 。 - 有许多+XXX(或 00XXX)数字,这些数字符合你4个特点的长篇投入。美国的+1(001)格式中的许多数字为t。我认为,如果是+或00,然后是至少一位数位数,而不是零,那么你就应当检查。

/^(+|00)[1-9]/.test( input.value );

Answer 2

与此类似:

$( #field ).keyup(function() {
    var value = $(this).val();

    // Restrict length to 4 characters
    if(value.length > 4) {
        value = value.substring(0, 3);
        $(this).val(value);
    }

    // Test is value equals to "00{number 2 digit only}"
    if(/00d{2}/.test(value)) {
        // Is valid
    } else {
        // Not valid
    }
});

I d 避免在不有效部分使用<代码>alert,因为这样每当用户发出钥匙时,就会给用户一个警示箱。

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