我有一個帶有“Date”元素和提交按鈕的HTML表單。有2個功能。一個用于計算“日期”HTML元素中給定出生日期的年齡。另一個功能是比較年齡和最小允許年齡。我需要幫助來完成它。在代碼中看到我的問題。是的，我見過其他類似的問題。我想學習，而不僅僅是復制/粘貼。如果我明白我的代碼/語法有什么問題，那么我會更好地學習。提前致謝。從“日期”計算年齡HTML元素

var minAge = 18;

var curDate = new Date();

var curr_year = curDate.getFullYear();

var curr_month = curDate.getMonth();

//Calculates age from given Birth Date in the form//

function _calcAge() {

var dt1 = document.getElementById('date').value;

var birth_date = new Date(dt1);

var birth_year = birth_date.getFullYear();

var birth_month = birth_date.getMonth();

var calc_year = curr_year - birth_year;

var calc_month = curr_month - birth_month;

//The following below is what I am not sure about.

//I need to combine years and months and

//convert them into a string??? Is this syntax dead wrong?

var final_result = (calc_year && "." && calc_month).toString();

// final result should be a number with a decimal point, example: 35.5

final_result = parseFloat;

return (final_result);

alert(final_result);

}

//Compares calculated age with minimum age and acts according to rules//

function _setAge() {

var age = _calcAge();

//alert("my age is " + age);

if (age < minAge) {

alert("You are not allowed into the site. The minimum age is 18!");

} else

alert("Welcome to my Site");

window.open(main.htm, _self);

}

Date Of Birth:

總結

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