Question

I found the JavaScript to break up the queryString of a page and pull a variable from it. I needed to do this so that I could create a new link that would put the website into a facebook app I am trying. Basically, we upload pages to our server which generates a long value (k). So, the URL is always http://www.oursite.com/webhost/login.asp?k=12342342334 etc.

Here is what I have so far:

function querySt(ji) {
    hu = window.location.search.substring(1);
    gy = hu.split("&");
    for (i=0;i<gy.length;i++) {
        ft = gy[i].split("=");
        if (ft[0] == ji) {
            return ft[1];
        }
    }
    var SurveyKey = querySt("k");
    var url = "http://apps.facebook.com/appname/k=" + SurveyKey;
    window.location = url;
}

So, I have a var called “url” which should give the correct URL for what I need it to do (basically just sets the page in a facebook canvas). I seem to be lost on how to make create a link for this.

It needs to be a button that someone clicks and it just opens a new window with the var url. What am I missing here? I tried

document.write="<a href="url...

but I can’t reference that variable.

Answer 1

Why not use PHP for it instead of Javascript? If you extract the variable from the URL in PHP you can just make the link:

<a href="www.oursite.com/webhost/login.asp?k=<?=$your_key?>">test</a>

If you want to do it in javascript:

var url;
function querySt(ji) {
    hu = window.location.search.substring(1);
    gy = hu.split("&");
    for (i=0;i<gy.length;i++) {
        ft = gy[i].split("=");
        if (ft[0] == ji) {
            return ft[1];
        }
    }
    var SurveyKey = querySt("k");
    url = "http://apps.facebook.com/appname/k=" + SurveyKey;

    insertInPage();
}

function insertInPage() {
    var content = "<a href=\"" + url + "\">link</a>"
    document.write(content);
    // or:   document.getElementById("your_id").innerHtml = content;
}

Something along those lines at least.