Calling one parameter in another function?

Question

Actually i want to take url and id from one fn to another whether this method will work.

function addElement(url, id) {
    alert(url);
    var main = document.getElementById('mainwidget');
    main.innerHTML = "<iframe src=" + url + " align='left' height='1060px' width='576px' scrolling='no'  frameborder='0' id='lodex'></iframe>";
    alert("google");
    addUrl(url, id);
}
function add() {
    addUrl(url, id)
    alert("id" + id);
    document.getElementById("Listsample").innerHTML = "<a href='#' onclick='addUrl(" + url + ");' id='cricket' tabindex='1' name='cricket'>" + id + "</a>";
}

Could you clean up this code to only contain the pieces relevant to your question? Otherwise it's hard to guess what your question is. Also, where do you call add? — nas
– nas, Commented Jul 12, 2010 at 6:52

gblazex · Accepted Answer · 2010-07-12 10:25:23Z

You need to share the information somehow, because variables are only available in their function's scope. The simplest way is to define global variables.

var url, id; // global

function addElement(_url, _id) {
    url = _url;
    id  = _id;
    alert(url);
    var main = document.getElementById('mainwidget');
    main.innerHTML = "<iframe>...</iframe>";
    alert("google");
    addUrl(url, id);
},

function add() {
    addUrl(url, id)
    alert("id" + id);
    document.getElementById("Listsample").innerHTML = "<a>...</a>";
}

Note that they don't need to be global. You can wrap this module into its own scope

(function() {

/// code goes here

})();

Or you can also organize the whole code into an object (encapsulation).

var addy = {

    url: null, 
    id: null,

    addElement: function(url, id) {
        this.url = url;
        this.id  = id;
        alert(url);
        var main = document.getElementById('mainwidget');
        main.innerHTML = "<iframe>...</iframe>";
        alert("google");
        addUrl(url, id);
    },

    add: function() {
        addUrl(this.url, this.id);
        alert("id" + this.id);
        document.getElementById("Listsample").innerHTML = "<a>...</a>";
    }
};

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