function change_image(el){
	    var image_source_attribute = el.setAttribute("src", "images/clicked_vote.png");
}
function vote_change(el){
		var javascript_votes= el.parentNode.getElementsByTagName("span")[1].firstChild.nodeValue++;
}
function vote_change_adjusted(el){
		var javascript_votes= el.parentNode.getElementsByTagName("span")[1].firstChild.nodeValue--;
}

function up(el, ip_address){
    change_image(el);
	vote_change(el); 
	var ajaxRequest;  // The variable that makes Ajax possible!
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
			var response_text= ajaxRequest.responseText;
			if(response_text== "One Vote per Story"){
			alert(response_text);
			vote_change_adjusted(el);
			}}
	}
var javascript_ip= ip_address;
var javascript_votes= el.parentNode.getAttribute("id");
var d = new Date();
var time = d.getTime();
var queryString = "?id=" + javascript_votes + "&date=" + time + "&ip=" + javascript_ip;
ajaxRequest.open("GET", "up.php" + queryString, true);
ajaxRequest.send(null); 
}