function init() {
		// quit if this function has already been called
		if (arguments.callee.done) return;
		
		// flag this function so we don't do the same thing twice
		arguments.callee.done = true;
		
		// kill the timer
		if (_timer) {
			clearInterval(_timer);
			_timer = null;
		}
		
		var refscript = document.createElement('script'); 
		refscript.setAttribute('src', 'http://marijuanavaporizer.com/js/ref_cookie.php?referer=' + encodeURIComponent(document.referrer)); 
		document.body.appendChild(refscript); 
	};
	
	/* for Mozilla */
	if (document.addEventListener) {
		document.addEventListener("DOMContentLoaded", init, false);
	}
	
	/* for Internet Explorer */
	/*@cc_on @*/
	/*@if (@_win32)
		document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
		var script = document.getElementById("__ie_onload");
		script.onreadystatechange = function() {
			if (this.readyState == "complete") {
				init(); // call the onload handler
			}
		};
	/*@end @*/
	
	/* for Safari */
	if (/WebKit/i.test(navigator.userAgent)) { // sniff
		var _timer = setInterval(function() {
			if (/loaded|complete/.test(document.readyState)) {
				init(); // call the onload handler
			}
		}, 10);
	}
	
	/* for other browsers */
	window.onload = init;