function kadabra(zap) {
    if (document.getElementById) {
    	var abra = document.getElementById(zap).style;
   		if (abra.display == "block") {
   			abra.display = "none";
   		} else {
    		abra.display = "block"
   		}
   		return false
    } else {
    	return true
    } 
    }