//SETTING UP OUR POPUP
//0 means disabled; 1 means enabled;
var popupStatus = 0;
//loading popup with jQuery magic!
function loadPopup(){
	//loads popup only if it is disabled
		if(popupStatus==0){
		$("#backgroundPopup").css({
		"opacity": "0.7"
		});
		$("#backgroundPopup").fadeIn("slow");
		$("#popup").fadeIn("slow");
		popupStatus = 1;
	}
}

//disabling popup with jQuery magic!
function disablePopup(){
	//disables popup only if it is enabled
	if(popupStatus==1){
		$("#backgroundPopup").fadeOut("slow");
		$("#popup").fadeOut("slow");
		popupStatus = 0;
	}
}

//centering popup
function centerPopup(){
	//request data for centering
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	var popupHeight = $("#popup").height();
	var popupWidth = $("#popup").width();
	var top = (windowWidth-popupWidth)/2;
	
	//centering
	$("#popup").css({
	"position": "absolute",
	"top": windowHeight/2-popupHeight/2,
	"left": top
	});
	
	//only need force for IE6
	$("#backgroundPopup").css({
	"height": windowHeight
	});
}

$(document).ready(function(){
						   	//LOADING POPUP
	//Click the button event!
	$(".popupBtnClick").click(function(){
		//centering with css
		centerPopup();
		//load popup
		loadPopup();
	});
	
	//CLOSING POPUP
	//Click the x event!
	$("#popupClose").click(function(){
		disablePopup();
	});
	//Click out event!
	$("#backgroundPopup").click(function(){
		disablePopup();
	});
	//Press Escape event!
	$(document).keypress(function(e){
		if(e.keyCode==27 && popupStatus==1){
			disablePopup();
		}
	});

});