/**
 * http://www.openjs.com/scripts/events/keyboard_shortcuts/
 * Version : 1.00.A
 * By Binny V A
 * License : BSD
 */
function shortcut(shortcut,callback,opt) {
	//Provide a set of default options
	var default_options = {
		'type':'keydown',
		'propagate':false,
		'target':document
	}
	if(!opt) opt = default_options;
	else {
		for(var dfo in default_options) {
			if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];
		}
	}

	var ele = opt.target
	if(typeof opt.target == 'string') ele = document.getElementById(opt.target);
	var ths = this;

	//The function to be called at keypress
	var func = function(e) {
		e = e || window.event;

		//Find Which key is pressed
		if (e.keyCode) code = e.keyCode;
		else if (e.which) code = e.which;
		var character = String.fromCharCode(code).toLowerCase();

		var keys = shortcut.toLowerCase().split("+");
		//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked
		var kp = 0;
		
		//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken
		var shift_nums = {
			"`":"~",
			"1":"!",
			"2":"@",
			"3":"#",
			"4":"$",
			"5":"%",
			"6":"^",
			"7":"&",
			"8":"*",
			"9":"(",
			"0":")",
			"-":"_",
			"=":"+",
			";":":",
			"'":"\"",
			",":"<",
			".":">",
			"/":"?",
			"\\":"|"
		}
		//Special Keys - and their codes
		var special_keys = {
			'esc':27,
			'escape':27,
			'tab':9,
			'space':32,
			'return':13,
			'enter':13,
			'backspace':8,

			'scrolllock':145,
			'scroll_lock':145,
			'scroll':145,
			'capslock':20,
			'caps_lock':20,
			'caps':20,
			'numlock':144,
			'num_lock':144,
			'num':144,
			
			'pause':19,
			'break':19,
			
			'insert':45,
			'home':36,
			'delete':46,
			'end':35,
			
			'pageup':33,
			'page_up':33,
			'pu':33,

			'pagedown':34,
			'page_down':34,
			'pd':34,

			'left':37,
			'up':38,
			'right':39,
			'down':40,

			'f1':112,
			'f2':113,
			'f3':114,
			'f4':115,
			'f5':116,
			'f6':117,
			'f7':118,
			'f8':119,
			'f9':120,
			'f10':121,
			'f11':122,
			'f12':123
		}


		for(var i=0; k=keys[i],i<keys.length; i++) {
			//Modifiers
			if(k == 'ctrl' || k == 'control') {
				if(e.ctrlKey) kp++;

			} else if(k ==  'shift') {
				if(e.shiftKey) kp++;

			} else if(k == 'alt') {
					if(e.altKey) kp++;

			} else if(k.length > 1) { //If it is a special key
				if(special_keys[k] == code) kp++;

			} else { //The special keys did not match
				if(character == k) kp++;
				else {
					if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase
						character = shift_nums[character]; 
						if(character == k) kp++;
					}
				}
			}
		}

		if(kp == keys.length) {
			callback(e);

			if(!opt['propagate']) { //Stop the event
				//e.cancelBubble is supported by IE - this will kill the bubbling process.
				e.cancelBubble = true;
				e.returnValue = false;

				//e.stopPropagation works only in Firefox.
				if (e.stopPropagation) {
					e.stopPropagation();
					e.preventDefault();
				}
				return false;
			}
		}
	}

	//Attach the function with the event	
	if(ele.addEventListener) ele.addEventListener(opt['type'], func, false);
	else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);
	else ele['on'+opt['type']] = func;
}

// Function to set up ESC to switch to weather network. The shortcut.js solution does not work in Firefox on the Mac so an alternative for that particular platform was built.
function kick(){
	var userAgent = navigator.userAgent.toLowerCase();
	if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1) {
		window.onkeypress = function(e) {
			var kC  = (window.event) ? event.keyCode : e.keyCode;
			var Esc = (window.event) ? 27 : e.DOM_VK_ESCAPE;
			if(kC==Esc) {
				window.location.href = 'http://www.theweathernetwork.com';
				return false;
			}
		}
	} else {
		//shortcut.add("esc",function(){ window.location.href = 'http://www.theweathernetwork.com'; return false; });
	};
}

$(document).ready(function(){
		kick();
	});