/* 
   liveUpdater.js originally written by Avi Bryant, author of
   Seaside (http://www.beta4.com/seaside2)  

   Modifed by Chris Double to add LiveUpdaterPost and use ' 
   instead of " for the id.
*/
function liveUpdaterUri(uri)
{
    return liveUpdater(function() { return uri; });
}

function liveUpdater(uriFunc)
{
    var request = false;
    var regex = /<(\w+).*?id='(\w+)'.*?>((.|\n)*)<\/\1>/;
    
    if (window.XMLHttpRequest) {
       	request = new XMLHttpRequest();
    }
    
    function update()
    {
        if(request && request.readyState < 4)
            request.abort();
            
        if(!window.XMLHttpRequest)
            request = new ActiveXObject("Microsoft.XMLHTTP");
        
        request.onreadystatechange = processRequestChange;
        request.open("GET", uriFunc());
        request.send(null);
        return false;
    }
   
    function processRequestChange()
    {
        if(request.readyState == 4)
        {
            var results = regex.exec(request.responseText);
            if(results)
                document.getElementById(results[2]).innerHTML = results[3];
        }
    }

    return update;
}

function liveUpdaterPost(uriFunc)
{
    var request = false;
    var regex = /<(\w+).*?id='(\w+)'.*?>((.|\n)*)<\/\1>/;
    
    if (window.XMLHttpRequest) {
       	request = new XMLHttpRequest();
    }
    
    function update(data)
    {
        if(request && request.readyState < 4)
            request.abort();
            
        if(!window.XMLHttpRequest)
            request = new ActiveXObject("Microsoft.XMLHTTP");
        
        request.onreadystatechange = processRequestChange;
        request.open("POST", uriFunc());
        request.send(data);
        return false;
    }
   
    function processRequestChange()
    {
        if(request.readyState == 4)
        {
            var results = regex.exec(request.responseText);
            if(results)
                document.getElementById(results[2]).innerHTML = results[3];
        }
    }

    return update;
}


function liveSearch(id, uri)
{
    var updater = liveUpdaterPost((function() { return uri; }));
    var last = "";
    var timeout = false;
   
    function update()
    {
       if (last != document.getElementById(id).value)
            updater("s=" + escape(document.getElementById(id).value));
    }
        
    function start() {
	   if (timeout)
	       window.clearTimeout(timeout);
	   
    	   timeout = window.setTimeout(update, 300);
    }

	
	if (navigator.userAgent.indexOf("Safari") > 0)
		document.getElementById(id).addEventListener("keydown",start,false);
    else if (navigator.product == "Gecko")
		document.getElementById(id).addEventListener("keypress",start,false);
    else
		document.getElementById(id).attachEvent("onkeydown",start);
}