Passing href value to another page using html and javascript

you can use the link like:

mysite.com/donate.html?www.yoursite.com.otherpage.html

and then using javascript:

var href = document.location.href;
var link = href.split('?')[1];

Basically you need to pass the value you required in querystring like mysite.com/donate.htm?key=value.

On donate.htm page you can use this function mentioned here How can I get query string values in JavaScript? to fetch the value you supplied in querystring by passing the key.

You can use the JavaScript (jQuery required) code below to attach a click event handler to all links with the donate class.

JS on page1.html and page2.html

$(document).ready(function() {
    $('a.donate').click(function() {
        // Retrieve the href value and store it in a variable.
        var href = $(this).attr('href');

        // Redirect a user to the desired page and passes the href value in query string.
        window.location.href = 'http://example.com/donate.html?href=' + href;

        // Ensure the original click event handler is not triggered.
        return false;
    })
});

After clicking a link the user will be redirected to the donate page where you can parse the query string and obtain the value of the href (which is what was in the <a href="..."> on the previous page).

There are many ways to parse the query string but the following quick&dirty code should work for you.

JS on donate.html

var location = document.location.href;
var queryString = location.split('?')[1];

// In the href variable is now what you are looking for.
var href = queryString.substr(5);

Here try this For example...... This is your html code

<a href="http://example.com/donate.html?www.yoursite.com.otherpage.html"></a>

As Ashkan said, use his javascript to parse the previous url from it... Paste this code on donate.html

<script>
var href = document.location.href;
var link = href.split('?')[1];
window.location.href = "http://"+link;// This will show you the link
</script>

Hope this helps;