// set the default values of the diary input form

	function diary_input_default() {
		
		date = new Date();
		
		dayofweek = date.getDay() + 1;	
		date_month = date.getMonth() + 1;
		date_day = date.getDate();
		date_year = date.getFullYear();
		time_hour = date.getHours();
		time_minute = date.getMinutes();
		
		time_minute = time_minute - (time_minute % 5); // round down to the nearest five minute interval
		time_minute = time_minute / 5; // convert from the actual minute value to the index of the menu
		
		if (time_hour > 12) {
			time_ampm = 2;
			time_hour = time_hour - 12;
		} else {
			time_ampm = 1;
		}
		
		document.diary_input.dayofweek.selectedIndex = dayofweek;
		document.diary_input.date_month.selectedIndex = date_month;
		document.diary_input.date_day.selectedIndex = date_day;
		document.diary_input.date_year.selectedIndex = date_year - document.diary_input.date_year.options[1].value + 1;
		document.diary_input.time_hour.selectedIndex = time_hour;
		document.diary_input.time_minute.selectedIndex = time_minute + 1;
		//document.diary_input.time_ampm.selectedIndex = time_ampm; // for menu
		document.diary_input.time_ampm[time_ampm - 1].checked = true; // for radio button
	
	}


// grab name/value pairs from the URL and set JavaScript variables accordingly
// - PHP does this automatically

	function getVars() {
	
		if (document.URL.indexOf('?') != -1) {
		
			queryString = document.URL.substring(document.URL.indexOf('?') + 1, document.URL.length);
			queryPairs = queryString.split("&")
			
			for (i=0; i < queryPairs.length; i++) {
				pair = queryPairs[i].split("=")
				key = pair[0]
				value = pair[1]
				eval(key + " = '" + value + "'")
			}
			
			if (queryString.indexOf("args=") != -1 ){
				argsPieces = args.split(",")
				for (i=0; i < argsPieces.length; i++) {
					j = i + 1
					eval("arg" + j + " = '" + argsPieces[i] + "'")
				}
			}
		
		} else {
			queryString = ""; queryPairs = ""; template = ""; args = ""
		}
			
	}
	

// return a value up to the delimiter, or the original value if the delimiter isn't there
// - this is used most often when parsing an argstring to set button states

	function crop(value,delimiter) {
		result = (value.indexOf(delimiter) != -1) ? value.substring(0, value.indexOf(delimiter)) : value ;
		return result
	}
	

// open a generic popup window, specifying source and size

	function popup(source,width,height) {
		now = new Date()
		window_name = now.getTime()
		popup_window = window.open(source,window_name,"width="+String(width)+",height="+String(height)+",location=no,menubar=no,directories=no,toolbar=no,scrollbars=yes,resizable=yes,status=yes");
		popup_window.focus()
	}


// the simplest possible rollover function

	function swap(name,state) {
		eval('document.images.' + name + '.src = ' + name + '_' + String(state) + '.src')
	}
	

// rollovers with sticky highlights
// - used in navigation frames where the buttons persist but other pages are changing

	var previous = null
	var current = null

	function stickySwap(name,state,hold) {
		if (hold == 1) {
			// set previously lit button to normal
			previous = current
			if (previous != null) {
				eval('document.images.' + previous + '.src = ' + previous + '_0.src')
			}
		}
		if ((name != null) && (name != current)) {
			// set new button state
			eval('document.images.' + name + '.src = ' + name + '_' + String(state) + '.src')
			if (hold == 1) {current = name}
		}
	}
	

// rollovers with separate but linked button and label graphics
// - highlights both the button and label if you mouse over either one 
// - requires graphics to be named like "button_0.gif" and "button_label_0.gif"

	function labelSwap(name,state) {
		eval('document.images.' + name + '.src = ' + name + '_' + String(state) + '.src')
		
		// change the label if one exists
		if (eval('document.images.' + name + '_label')) {
			eval('document.images.' + name + '_label.src = ' + name + '_label_' + String(state) + '.src')
		}
		
		// change the button if this is a label
		if (name.indexOf("_label") != -1) {
			name = name.substr(0,(name.length - 6))
			if (eval('document.images.' + name)) {
				eval('document.images.' + name + '.src = ' + name + '_' + String(state) + '.src')
			}
		}
	}
	

// write a block of code that preloads a list of graphics
// - this version makes on and off states and is most often used for button rollovers

	function preloadButtons(names) {
		names = names.split(",")
		for (i=0; i < names.length; i++) {
			thisName = names[i]
			eval(thisName+"_0 = new Image()")
			eval(thisName+"_0.src = '../graphics/"+thisName+"_0.gif'")
			eval(thisName+"_1 = new Image()")
			eval(thisName+"_1.src = '../graphics/"+thisName+"_1.gif'")
			if (thisName.indexOf("menu_") != -1) {
				eval(thisName+"_2 = new Image()")
				eval(thisName+"_2.src = '../graphics/"+thisName+"_2.gif'")
			}
		}
	}
	

// write a block of code that preloads a list of graphics
// - this version just makes an on state and is most often used for tips associated with button rollovers

	function preloadTips(names) {
		names = names.split(",")
		for (i=0; i < names.length; i++) {
			thisName = names[i]
			eval(thisName+" = new Image()")
			eval(thisName+".src = '../graphics/"+thisName+".gif'")
		}
	}
	

// write a block of code that preloads a list of graphics
// - this version uses the same source file for each instance and is most often used for markers associated with button rollovers

	function preloadMarkers(names,marker_name) {
		names = names.split(",")
		for (i=0; i < names.length; i++) {
			thisName = names[i]
			eval(thisName+"_0 = new Image()")
			eval(thisName+"_0.src = '../graphics/"+marker_name+"_0.gif'")
			eval(thisName+"_1 = new Image()")
			eval(thisName+"_1.src = '../graphics/"+marker_name+"_1.gif'")
		}
	}
	

// leave this here to catch calls to the original preload script

	function makePreloads(names) {
		preloadButtons(names)
	}
	

// returns the index of an array element, something that ought to be built into JavaScript but isn't!
// returns "" if not present

	function getPosition(string, array) {
		for (i=0; i < array.length; i++) {
			if (array[i] == string) {
				return i
				break
			}
		}
		return ""
	}


// this is handy for preventing the Return key from submitting forms (set form action to "JavaScript:nothing()")
	
	function nothing() {}