//Redirect enter key to point to the correct button to click.
function doClick(buttonName,e) 
{
    var key;
    if(window.event)
        key = window.event.keyCode; //IE
    else
        key = e.which; //firefox

    if (key == 13) 
    {
        //Get the button the user wants to have clicked
        var btn = document.getElementById(buttonName);
        if (btn != null) 
        {
            btn.click();
            if(window.event){
                 event.keyCode = 0;
            }
        }
    }
}

// Send post data to a specified url.
function makePOSTRequest(url, parameters) 
{
    var http_request = false;
    var result = false;

    if (window.XMLHttpRequest) 
    { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) 
        {
            // set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
        }
    } 
    else if (window.ActiveXObject) 
    { // IE
        try 
        {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try 
            {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }
    
    if (!http_request) 
    {
        // Cannot create XMLHTTP instance
        return false;
    }
  
    http_request.onreadystatechange = function() 
    {
        if (http_request.readyState == 4)
        {
            if (http_request.status == 200)
            {
                // Success
                result = true;
            }
            else
            {
                // Failure
                alert('There was a problem with the request.');
                result = false;
            }
        }
    };
    http_request.open('POST', url, true);
    http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    http_request.setRequestHeader("Content-length", parameters.length);
    http_request.setRequestHeader("Connection", "close");
    http_request.send(parameters);
}