function addEvent(obj, type, fn) {
	if (obj.addEventListener)
		obj.addEventListener( type, fn, false );
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
	}
}

function bgImage() {

	if (document.body.clientWidth < 1241) {
		document.body.style.backgroundImage = "none";
	} 	else {
		document.body.style.backgroundImage = "url(images/body-bg.jpg)";
		}
}

addEvent(window, "load", bgImage);
addEvent(window, "resize", bgImage);