// This is the main utility script file for the portal

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			if (oldonload) {
				oldonload();
			}
			func();
		}
	}
}


function array_remove(a, item) {

	new_array = new Array();
	for (var i =  0; i < a.length; i++) {
		if (a[i] != item) {
			new_array[(new_array.length)] = a[i];
		}
	}

	a = new Array();
	for (h = 0; h < new_array.length; h++) {
		a[h] = new_array[h];
	}
		
	return a;

}


function write_to_element(element_id, content) {

	var this_element = document.getElementById(element_id);
	this_element.innerHTML = content;

}

function array_search(needle, haystack) {

	if (haystack.length == 0) { return false; }
	
	for (var i = 0; i < haystack.length; i++) {
		if (needle == haystack[i]) { return true; }
	}
	
	return false;

}

function get_field_value_by_name(element_name) {

	// warning... if result is an integer, you'll need to cast it as such
	var these_values = new Array();
	var element_list = document.getElementsByTagName('input');
	for (var i = 0; i < element_list.length; i++) {
		if (element_list[i].name == element_name && element_list[i].checked==1) {
			these_values[these_values.length] = element_list[i].value;
		}
	}
	return these_values.join(',');

}

function match_checkboxes(master_id, element_name) {

	// master_name is the "id" of the field you're trying to match
	//    by giving it an id, we don't need to look through the whole object heirarchy
	// element name is the "name" of elements you're trying to change
	
	var master_setting = document.getElementById(master_id).checked;

	var element_list = document.getElementsByTagName('input');
	for (var i = 0; i < element_list.length; i++) {
		if (element_list[i].name == element_name) {
			element_list[i].checked = master_setting;
		}
	}

}

function checkbox_select_all(element_name) {

	var element_list = document.getElementsByTagName('input');
	for (var i = 0; i < element_list.length; i++) {
		if (element_list[i].name == element_name) {
			element_list[i].checked = 1;
		}
	}

}

function checkbox_select_none(element_name) {

	var element_list = document.getElementsByTagName('input');
	for (var i = 0; i < element_list.length; i++) {
		if (element_list[i].name == element_name) {
			element_list[i].checked = 0;
		}
	}

}

function checkbox_select_opposite(element_name) {

	var element_list = document.getElementsByTagName('input');
	for (var i = 0; i < element_list.length; i++) {
		if (element_list[i].name == element_name) {
			element_list[i].checked = !element_list[i].checked;
		}
	}

}

function get_select_box_value(element_id) {

	var e = document.getElementById(element_id);
	
	return e.options[e.selectedIndex].value;
	
}

function set_select_box_value(element_id, element_value) {

	var e = document.getElementById(element_id);
	
	for (var i = 0; i < e.options.length; i++) {
		if (e.options[i].value == element_value) {
			e.selectedIndex=i;
		}
	}

}

function select_box_link(element_id, link_stub) {

	// this function gets the value of a select box, adds it to the 
	// link stub and redirects the users to that page.
	// it is used for selectbox/icon combo tools
	
	var param = get_select_box_value(element_id);
	
	var url = link_stub + param + '/';
	
	window.location.href=url;

}


function hide_element(element_id) {

	var e = document.getElementById(element_id);
	e.style.display = 'none';	

}

function show_inline_element(element_id) {

	var e = document.getElementById(element_id);
	e.style.display = 'inline';	

}

function show_block_element(element_id) {

	var e = document.getElementById(element_id);
	e.style.display = 'block';	

}

function toggle_block_element(element_id) {

	if ($(element_id).css('display') == 'block') {
		$(element_id).fadeOut('slow');
	} else {
		$(element_id).fadeIn('slow');
	}

}

function toggle_info_block(link, element_id) {
	var offset = $(link).offset();
	var info_block_top = offset.top + 'px';
	var info_block_left = offset.left + 'px';
	if ($(element_id).css('display') == 'block') {
		$(element_id).fadeOut('slow');
	} else {
		$(element_id).css({
						'position': 'absolute',
						'left': '0',
						'top': '25px',
						'width': '250px',
						'z-index': 1000000,
						'box-shadow': '3px 3px 10px #555',
						'-moz-box-shadow': '3px 3px 10px #555',
						'-webkit-box-shadow': '3px 3px 10px #555'
						});
		$(element_id).fadeIn('slow');
	}
}



// functions for removing elements

function deleteParent(element) {

	var parent = element.parentNode;
	var grandparent = parent.parentNode;
	grandparent.removeChild(parent);

}

function deleteGrandParent(element) {

	var parent = element.parentNode;
	var grandparent = parent.parentNode;
	var greatgrandparent = grandparent.parentNode;
	greatgrandparent.removeChild(grandparent);

}

function deleteGreatGrandParent(element) {

	var parent = element.parentNode;
	var grandparent = parent.parentNode;
	var greatgrandparent = grandparent.parentNode;
	var greatgreatgrandparent = greatgrandparent.parentNode;
	greatgreatgrandparent.removeChild(greatgrandparent);

}

function deleteGreatGreatGrandParent(element) {

	var parent = element.parentNode;
	var grandparent = parent.parentNode;
	var greatgrandparent = grandparent.parentNode;
	var greatgreatgrandparent = greatgrandparent.parentNode;
	var greatgreatgreatgrandparent = greatgreatgrandparent.parentNode;
	greatgreatgreatgrandparent.removeChild(greatgreatgrandparent);

}


// Functions for the activity grid

/*function toggle_section(section_id) {

	var section = document.getElementById(section_id);
	
	console.log(section.style.display);
	
	if (section.style.display == "none" || section.style.display == "" || section.style.display == null) {
		section.style.display = "block";
		//link_object.innerHTML = "hide";
	} else {
		section.style.display = "none";
		//link_object.innerHTML = "expand";
	}

}*/

function old_hide_all_sections() {

	divs = document.getElementsByTagName("DIV");
	for (var i = 0; i < divs.length; i++) {
		if (divs[i].className.match("unit-activities")) {
			divs[i].style.display = "none";
		}
	}
	
	lis = document.getElementsByTagName("LI");
	
	for (var i = 0; i < lis.length; i++) {
		if (lis[i].className.match("unit-navigation")) {
			lis[i].style.borderRightColor = '#666666';
		}
	}

}

function hide_all_sections() {

	$('div.unit-activities').hide();
	$('li.unit-navigation').removeClass('selected-category'); // resets category link to default style

}

function show_section(section_id, link_object) {

	hide_all_sections();
	$(section_id).css('display', 'block');
	$(section_id).addClass('selected-category'); // allows active section to take on proper styling
	$(link_object).addClass('selected-category'); // allows active link to take on proper styling

}