$.fn.centerit = function(show) {
	var windowHeight = $(window).height();
	var contentHeight = $(this).height();
	var windowWidth = $(window).width();
	var contentWidth = $(this).width();
	
	if(windowHeight > 0 && windowWidth > 0)
	{
	
		var centerTop = ((windowHeight / 2) - (contentHeight / 2));
		var centerLeft = ((windowWidth / 2) - (contentWidth / 2));
		
		$(this).css("position", "fixed");
		$(this).css("top", centerTop);
		$(this).css("left", centerLeft);
		
		if(typeof(show) != "undefined" && show == true)
			$(this).css("display", "block");
	}
	else
	{
		$(this).css("position", "static");
	}
	return this;
};

//checks for control + shift + ?? key combinations
$.ctrlCombo = function(key, callback, args) {
	//attach even handler to the document on a keydown event 
	$(document.documentElement).keydown(function (event) {
		// handle cursor keys
		if(!args) args=[];  //IE fluke
		//check if the specified key and control key is down
		if (event.keyCode == key.charCodeAt(0) && event.ctrlKey && event.shiftKey) 
		{
			//call the callback code
			callback.apply(this, args);
			return false;
		}
	});
};

$.admin = function(showKey, hideKey) {
	var isAdmin = false;
			
	//admin panel is hiden by default, this will put opacity to 0
	$("#admin_login").animate({opacity:0.0}, 1).hide();
		
	//show admin panel event
	$.ctrlCombo(showKey, function() {
		doAdmin();
	});
	//hide admin panel event
	$.ctrlCombo(hideKey, function() {
		undoAdmin();
	});
	
	var doAdmin = function()
	{
		if(!isAdmin)
		{
			$("#admin_login").animate({opacity:1.0}, 1000).show();
			isAdmin = true;
		}
	}
	
	var undoAdmin = function()
	{
		if(isAdmin)
		{
			$("#admin_login").animate({opacity:0.0}, 1000).hide();
			isAdmin = false;
		}
	}
	
}

$(document).ready(function() {	
	//control + shift + a to show admin panel
	//control + shift + x to hide admin panel
	$.admin('A', 'X');
	
	//ajax request to check if admin is logged in
	$.ajax(
	{
		type: "POST",
		url: "/users/checkadmin",
		data: "",
		dataType: "html",
		error: function(XMLHttpRequest, textStatus, errorThrown)
		{
		},
				
		success: function(str)
		{
			if(str == "TRUE")
			{
				doAdmin();
			}
		}
	});
	
	$("#ContactForm").submit(function() {
		var name = $("#ContactForm input[name='data[Contactus][name]']").val();
		var phone = $("#ContactForm input[name='data[Contactus][phone]']").val();
		
		var msg = "";
		
		if(name == "Name:" || name == "")
			msg += "Please enter your name.\n";
		if(phone == "Phone:" || phone == "")
			msg += "Please enter your phone number.\n";
			
		if(msg.length > 0)
		{
			alert(msg);
			return false;
		}
			
		return true;
	});
	
	//contact us form message box limit
	$("textarea.textbox_limit").each(function() {
		
		//remove the textbox_limit class
		$(this).removeClass("textbox_limit");
		//the next class in the textbox should be the numerical number of the limit for the box
		var limit = parseInt($(this).attr("class")) - 1;
		//after finding the limit from the class, add the textbox_limit classs back on
		$(this).addClass("textbox_limit");
		
		//capture the keydown on the text box
		$(this).keydown(function(event) {
			
			//get the texbox length
			var textLen = $(this).val().length;
			
			//if textbox length exceeds the limit and backspace was not pressed, prevent key from being entered into textbox
			if(textLen > limit && event.keyCode != '8')
			{
				event.preventDefault();
			}
		
		});
	});
});