if (document.addEventListener) {       
   document.addEventListener("keypress",keypress,false);              
} else if (document.attachEvent) {       
   document.attachEvent("onkeypress", keypress);
} else {
   document.onkeypress= keypress;
}
    
function keypress(e) {
	if (!e) e= event;
	switch(e.keyCode){
		case 27:
			closePreview();
			closeContact();
			break;
		default:
			break;
	}
}