// Set global variables
var hideDDTimer_polls = false;
var hideDDTimer_activity = false;
var hideDDTimer_groupSettings = false;
var totCheckboxes = 0;
var cursorPosX = 0;
var cursorPosY = 0;
var moveObject = false;
var moveObjectId = '';
var baseUrl = 'http://www.kommeralla.se/';
	
	
/**
 * Make sure that a given participant has a correct email and that both the name and the email is given
 * @return boolean participantOk is true if everything is ok, otherwise false
 */
function checkParticipantInfo() {
	if (DHTMLObj("participantName").value != "" && DHTMLObj("participantEmail").value != "") {
		alert('true');
		return true;
	} else {
		alert('false');
		return false;
	}
}


/**
 * Returns an instance of an object that is cross browser compatible
 * @param object object is the object to use
 */
function DHTMLObj(object) {
	if (document.all) {															// Explorer 4,5
		return document.all[object];
	} else if (document.getElementById) {										// Netscape 6
		return document.getElementById(object);
	} else if (document.layers) {												// ?vriga l?sare
		document[object].open();
		return document[object];
	}
}


/**
 * An empty function that doesn't do anything.
 * Used to enable the use of "dead" links.
 */
function doNothing() {

}


/**
 * Get vertical scroll position
 * @return int value of the vertical scrolled offset
 */
function getScrollOffset() {
	var b = document.body;
	var d = document.documentElement;
	if (b && b.scrollTop) return body.scrollTop;
	if (d && d.scrollTop) return d.scrollTop;
	if (window.pageYOffset) return window.pageYOffset;
	return 0;
}


/**
 * Hide a given drop down menu if the hideDropDown timer is set to true
 * @param string objId is the dhtml id of the drop down to hide
 */
function hideDDMenu(objId) {
	if (objId == "div_dd_polls" && hideDDTimer_polls != false) {
		hideDDTimer_polls = false;
		DHTMLObj(objId).style.display = 'none';
	} else if (objId == "div_dd_activity" && hideDDTimer_activity != false) {
		hideDDTimer_activity = false;
		DHTMLObj(objId).style.display = 'none';
	} else if (objId == "div_dd_groupSettings" && hideDDTimer_groupSettings != false) {
		hideDDTimer_settings = false;
		DHTMLObj(objId).style.display = 'none';
	}
}


/**
 * Opens a new window without menubar etc.
 * @param string openPage is the URL to the page to be opened
 * @param int w sets the width of the opened page
 * @param int h sets the height of the opened page
 */
function newWin (openPage, w, h) {
	var centerScreen = Math.floor((screen.width / 2) - (w/2));
	var properties="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no";
	properties+=",width=" + w + ",height=" + h + ",top=15,left=" +centerScreen;
	unik=new Date();
	unik=unik.getSeconds()+"_"+unik.getMinutes()+"_"+unik.getHours();
	window.open(openPage, unik, properties);
}


/**
 * Open a given drop down menu and stop the hideDropDown timer
 * @param string objId is the dhtml id of the drop down to open
 */
function openDDMenu(objId) {
	if (objId == "div_dd_polls") {
		hideDDTimer_polls = false;
		strActivityStyle 	= 'none';
		strGroupStyle 		= 'none';
		strMembersStyle 	= 'block';
	} else if (objId == "div_dd_activity") {
		hideDDTimer_activity = false;
		strActivityStyle 	= 'block';
		strGroupStyle 		= 'none';
		strMembersStyle 	= 'none';
	} else if (objId == "div_dd_groupSettings") {
		hideDDTimer_groupSettings = false;
		strActivityStyle 	= 'none';
		strGroupStyle 		= 'block';
		strMembersStyle 	= 'none';
	}
	
	if (DHTMLObj("div_dd_activity")) {
		DHTMLObj("div_dd_activity").style.display = strActivityStyle;
	}
	if(DHTMLObj("div_dd_groupSettings")) {
		DHTMLObj("div_dd_groupSettings").style.display = strGroupStyle;
	}
	if (DHTMLObj("div_dd_polls")) {
		DHTMLObj("div_dd_polls").style.display = strMembersStyle;
	}
}


/**
 * Select/Unselect all checkboxes with the given id contantinated with a counter 0 to the global variable totCheckboxes
 * @param string objId is the id of the checkboxes to select/unselect
 */
function selectAll(objId) {
	if (DHTMLObj('chk_select_all') && DHTMLObj('chk_select_all').checked) {
		bolChecked = true;
	} else {
		bolChecked = false;
	}
	
	for (i=0; i<totCheckboxes; i++) {
		if (DHTMLObj(objId + i)) {
			DHTMLObj(objId + i).checked = bolChecked;
		}
	}
}


/**
 * Set the position of a given object. The position is given as a number of pixles from the left and top margins
 * @param string obj is the DHTML id of the object to update the position for
 * @param int posX is the number of pixles from the left margin to position the given object
 * @param int posY is the number of pixles from the top margin to position the given object
 */
function setObjectPosition(obj, posX, posY) {
	var object = DHTMLObj(obj);
	if (posX < 1) {
		posX = (cursorPosX - 50 < 1) ? 50 : posX = cursorPosX - 50;
	}
	if (posY < 50) {
		posY = 50;
	}
	object.style.left = posX + "px";
	object.style.top = posY + "px";
}


/**
 * Start trace of cursor position (X and Y coordinates).
 */
function startCursorTracer() {
	if (document.all || document.getElementById) {
		document.body.onmousemove = traceCursor;
		//document.onmousemove = traceCursor;
	} else if (document.layers) {
		window.captureEvents(Event.MOUSEMOVE);
		window.onMouseMove = traceCursor;
	}
}


/**
 * Switches a checkbox value for a given DHTML object
 * @param int id decides what checkbox to check/uncheck
 */
function switchCheckbox(id) {
	if (DHTMLObj(id).checked) {
		DHTMLObj(id).checked = false;
	} else {
		DHTMLObj(id).checked = true;
	}
}


/**
 * Switches the display property for a given DHTML object
 * @param int id decides what object is set to visible or not
 */
function switchDisplay(id) {
	if (DHTMLObj(id).style.display == "block") {
		DHTMLObj(id).style.display = "none";
	} else {
		DHTMLObj(id).style.display = "block";
	}
}


/**
 * Switches between different settings displays
 * @param int id for the div that should be visible
 */
function switchSettings(id) {
	for (i=0; i<3; i++) {
		if (DHTMLObj('settingsDiv'+i).style.display == "block") {
			DHTMLObj('settingsDiv'+i).style.display = "none";
		}
	}
	DHTMLObj('settingsDiv'+id).style.display = "block";
}


/**
 * Trace cursor position for nice display of e.g. help boxes
 * @param event event is the cursor object to use when checking for its position
 */
function traceCursor(myEvent)
{
	myEvent = myEvent || window.event;
	
	if(myEvent.pageX || myEvent.pageY){
    cursorPosX = myEvent.pageX;
    cursorPosY = myEvent.pageY;
  } else {
    cursorPosX = myEvent.clientX;
    cursorPosY = myEvent.clientY;
  }
  
  cursorPosY += getScrollOffset();
  
  if (moveObject && moveObjectId != '') {
  	setObjectPosition(moveObjectId, cursorPosX, cursorPosY);
  }
}


/**
 * Fills a form with user details, enabling it to update user details in an easy way
 * @param int user_id is the id of the user to update
 * @param string email is the email to the user to update
 * @param string fullname is the fullname of the user to update
 * @param string nickname is the nickname of the user to update
 * @param string phone is the phone to the user to update
 * @param string mobile is the mobile to the user to update
 * @param string city is the city where the user to update lives
 */
function updateUser(user_id, email, fullname, phone, mobile, city) {
	DHTMLObj('user_id').value = user_id;
	DHTMLObj('txt_email').value = email;
	DHTMLObj('txt_name').value = fullname;
	DHTMLObj('phone').value  = phone;
	DHTMLObj('mobile').value = mobile;
	DHTMLObj('city').value = city;
	
	if (user_id == "-1") {
		DHTMLObj('updateUserTitle').innerHTML = "Skapa ny medlem i gruppen";
		DHTMLObj('submitButton').value = "Lägg till gruppmedlem";
	} else {
		DHTMLObj('updateUserTitle').innerHTML = "Uppdatera information om gruppmedlem";
		DHTMLObj('submitButton').value = "Spara uppgifter";
	}
	
	setObjectPosition('box_update_member',cursorPosX-200, (cursorPosY+20));
	DHTMLObj('box_update_member').style.display = 'block';
	DHTMLObj('txt_email').focus();
}


/**
 * Validates a form to make sure that a given (required) field is not empty
 * @param string obj1 is the id of a checkbox that is required
 * @param string obj2 is the id of a text field that is required (not empty)
 * @param string errMsg defines the error message if both obj1 and obj2 failes the validation
 * 
 * @return boolean true if the given object is not empty, otherwise false
 */
function validateRequiredField(obj1, obj2, errMsg) {
	if (!DHTMLObj(obj1).checked || DHTMLObj(obj2).value != "") {
		event.returnValue = true;
		return true;
	} else {
		alert(errMsg);
		DHTMLObj(obj2).focus();
		event.returnValue = false;
		return false;
	}
}


/**
 * Validates a given date to make sure that the format is ok (yyyy-mm-dd)
 * @param object obj is the object that triggers the function
 * @param string nextFocus is the DHTML id of the object to set focus on if the validation was successful
 * @return boolean true if the date format looks ok, otherwise false
 */
function validateDateFormat(obj, nextFocus) {
	var month, day, year;
	var strDate = obj.value;
	var re = /\b\d{1,4}[\/-]\d{1,2}[\/-]\d{2}\b/;
	if (re.test(strDate)) {
		var delimChar = (strDate.indexOf("/") != -1) ? "/" : "-";
		var delim1 = strDate.indexOf(delimChar);
		var delim2 = strDate.lastIndexOf(delimChar);
		year = parseInt(strDate.substring(0, delim1), 10);
		month = parseInt(strDate.substring(delim1+1, delim2), 10);
		day = parseInt(strDate.substring(delim2+1), 10);
		var testDate = new Date(year, month-1, day);
		//alert(testDate)
		if (testDate.getDate() == day) {
			if (testDate.getMonth() + 1 == month) {
				if (testDate.getFullYear() == year) {
					if (DHTMLObj(nextFocus)) {
						DHTMLObj(nextFocus).focus();
					}
					return true;
				}
			}
		}
	}
	
	alert("Felaktigt datumformat.\nDatumet ska skrivas som åååå-mm-dd\nExempel: 2007-03-27");
	obj.focus();
	obj.select();
	
	return false;
}


/**
 * Validates a given email to make sure that it looks ok
 * @param string email is the email address to validate
 * @return boolean true if the email is ok, otherwise false
 */
function validateEmail(email) {
	var filter = /^.+@.+\..{2,4}$/;
	if (email != "" && filter.test(email)) {
		return true;
	} else {
		alert('Felaktig e-post.\nAlla medlemmar i gruppen måste ha giltiga e-postadresser.\nFyll i en giltig e-postadress och försök igen.');
		DHTMLObj('email').focus(); 
		return false;
	}
}