Open link with POST method

postToURL.js

// <a href="javascript: ... ">Open</a>

function post_to_url(url, params) {
    var form = document.createElement('form');
    form.action = url;
    form.method = 'POST';
    for (var i in params) {
        if (params.hasOwnProperty(i)) {
            var input = document.createElement('input');
            input.type = 'hidden';
            input.name = i;
            input.value = params[i];
            form.appendChild(input);
        }
    }
    form.submit();
}