function openAjaxConfirm() {  
    var text = '<object width="595" height="385"><param name="movie" value="'+_swf+'"><embed src="'+_swf+'" width="595" height="385"></embed></object>';
	Dialog.alert(text, {className: "alphacube", width:595, height:400, okLabel: "Sluit",overlayShowEffectOptions:2});
}

if (document.addEventListener) {
	document.addEventListener("DOMContentLoaded", init, false);
}
window.onload = init;

function init(){
	if (document.getElementById('open_window') != null){
		document.getElementById('open_window').onclick = function(){
			openAjaxConfirm();
		}
	}
}