function change_form() {
	var s = (document.addition.evtype.length);
	var tr = [];
	
	// Row id names
	tr[0] = "oneoff";
	tr[1] = "regdays";
	tr[2] = "irregdays";
	
	var u = document.getElementById("daytimes");
	
	/* Browser detection for IE, (IE does not support "display: table-row") */
	
	var browser = navigator.appName;
	
	if(browser == "Microsoft Internet Explorer") {
		var e = "block";
	} else {
		var e = "table-row";
	}
	
	for(i = 0; i < s; i++) {
		var t = document.getElementById(tr[i]);
	
		if(document.addition.evtype[i].checked == true) {
			t.style.display = e;
		} else {
			t.style.display = "none";
		}
	}
	
	return false;
}

function form_validate() {
	/* Create the control */
	var validation = true;
	var e = "The form has the following errors: \n\n";
	
	/* First, check to see our event has a title */
	if(document.addition.title.value == "") {
		e += "- Please enter a name for your event \n";
		validation = false;
	}
	
	/* Now, make sure we have an event type selected... */
	if(document.addition.evt.selectedIndex == 0) {
		e += "- Please choose an event category \n";
		validation = false;
	}
	
	/* Make sure one event frequency is selected */
	var i = 0;
	
	while((i < document.addition.evtype.length) && (document.addition.evtype[i].checked == false)) {
		i++;
	}
	
	/*if((i = document.addition.evtype.length) && document.addition.evtype[(i - 1)].checked == false) {
		e += "- Please choose how frequently the event is to occur\n";
		validation = false;
	}*/
	
	if(document.addition.cx.checked == false) {
		e += "- Please tick the box to agree to our terms and conditions\n";
		validation = false;
	}
	
	if(validation == false) {alert(e);}
	
	return validation;
}