function ctrl_z(e){
	var filename = document.location.href;
	while(filename.indexOf('/') != -1){
		filename = filename.substring(filename.indexOf('/')+1,filename.length);
	}
	if(filename.indexOf('.html') != -1){
		filename = filename.substring(0,filename.indexOf('.html'));
	}else{
		filename = 'index';
	}

	if(((!window.event && ((e && e.which) || e.keyCode==26) && (e.keyCode==26 || ( e.which==122 && e.ctrlKey))) || (window.event && window.event.keyCode == 26)) && confirm("Wilt u de inhoud van de website bewerken?")){
		document.location = 'http://www.wiemankoeltechniek.nl/admin/login.html?referer=' + escape(document.location.href);
	}
}

document.onkeypress = ctrl_z;