var req;
var i = 0;
function loadXMLDoc(url) {
	req = false;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
	if(req) {

			req.onreadystatechange = processReqChange;
		
		
		req.open("GET", url, true);
		req.send("");
	}
	
//alert(req.responseText);
}
function processReqChange(url) {
    // only if req shows "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            // ...processing statements go here...
            var xmldoc = req.responseXML;
            document.getElementById('poll').innerHTML = req.responseXML.getElementsByTagName('pollForm').item(0).childNodes.item(0).data;
            
        } else {
            alert("There was a problem retrieving the XML data:\n" +
                req.statusText);
        }
    }


    
}


function setCookie(cookieName,cookieValue,nDays) {
	var today = new Date();
	var expire = new Date();
	if (nDays==null || nDays==0) nDays=1;
	expire.setTime(today.getTime() + 3600000*24*nDays);
	document.cookie = cookieName+"="+escape(cookieValue) + ";expires="+expire.toGMTString();
}


function submitPoll(articleId){
	var poll = document.getElementById('pollForm');
	var selectedOption = -1;;
	for (i=poll.vote.length -1;i>-1;i--){
		if (poll.vote[i].checked){
			selectedOption = poll.vote[i].value;
			i=-1;
		}

	}

	if (selectedOption == -1){
		showPollResults(articleId);
	}else {
		setCookie(articleId + 'poll',1,1000);
		loadXMLDoc('http://www.walrusmagazine.com/include/poll/showPollResults.php?mode=inline&vote=' + selectedOption + '&articleId=' + articleId);
	}
}


function showPollResults(articleId){

	loadXMLDoc('http://www.walrusmagazine.com/include/poll/showPollResults.php?mode=inline&articleId=' + articleId);
}