jQuery / Javascript：在函数中定义全局变量？

Question

I have this code:

        var one;
        $("#ma1").click(function() {
            var one = 1;
        })
        $("body").click(function() {
            $('#status').html("This is 'one': "+one);
        })

and when I click the body, it says: This is 'one': undefined. How can I define a global variable to be used in another function?

Answer 1

Remove the var from inside the function.

    $("#ma1").click(function() {
        one = 1;
    })

Answer 2

如果要创建全局变量，请将其绑定到window对象

window.one = 1;

Answer 3

    var one;//define outside closure

    $("#ma1").click(function() {
        one = 1; //removed var 
    })
    $("body").click(function(e) {
        $('#status').html("This is 'one': "+one);
    })