var httpRequest = false;

function set_unit_width(obj, left_set, width_set) {
	obj.style.left = '' + left_set + 'px';
	obj.style.width = '' + width_set + 'px';
	//document.getElementById(id_to_set).offsetWidth = width_set;
	//document.getElementById(id_to_set).clientWidth = width_set;
}

function ajax_rate_item( use , id , rating ) {
	
	var params = "object_use=" + encodeURI( use ) +
				"&object_id=" + encodeURI( id ) +
				"&object_rating=" + encodeURI( rating );
	
	var url = "ajax/a_new_rating.php";
	var mime = "application/json";
	
	if (window.XMLHttpRequest) {
		httpRequest = new XMLHttpRequest();
		if (httpRequest.overrideMimeType) {
			// set mime type accordingly
			httpRequest.overrideMimeType(mime);
		}
	}
	else if (window.ActiveXObject) { // IE
		try {
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			try {
				httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {}
		}
	}
	if (!httpRequest) {
		alert('Create XMLHTTPRequest failed.');
		return false;
	}
	
	httpRequest.open('POST', url, true);
	httpRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	httpRequest.setRequestHeader("Content-length", params.length);
	httpRequest.setRequestHeader("Connection", "close");
	
	httpRequest.onreadystatechange = function() {
		if (httpRequest.readyState == 4) {
			if (httpRequest.status == 200) {
				if(httpRequest.responseText != "NULL") {
					//alert(httpRequest.responseText);
					//resp = eval("(" + httpRequest.responseText + ")");
				}
				else {
					showdiv("ratings_unavailable");
				}
			}
			else {
				showdiv("ratings_unavailable");
				alert(httpRequest.responseText);
				alert('Request failed.' + httpRequest.status);
			}
		}
	};
	
	httpRequest.send(params);
	return true;
}