/**
 * @author erik willems
 * functions to create a lightbox popup
 */


var popupStatus = 0;

/**
 * starts the popup
 */
function triggerPopup() {
	centerPopup();
	loadPopup();
}


/**
 * loads the popup
 */
function loadPopup(){
	if(popupStatus==0){
		$("#uploadbox").hide();
		$("#backgroundPopup").css({
			"opacity": "0.5"
		});
		$("#backgroundPopup").fadeIn("slow");
		$("#popupContact").fadeIn("slow");
		popupStatus = 1;
	}
}

/**
 * displays the popup
 */
function disablePopup(){
	if(popupStatus==1){
		$("#backgroundPopup").fadeOut("slow");
		$("#popupContact").fadeOut("slow");
		$("#uploadbox").show("slow");
		popupStatus = 0;
	}
}

/**
 * centers the popup
 */
function centerPopup(){
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	var popupHeight = $("#popupContact").height();
	var popupWidth = $("#popupContact").width();
	$("#popupContact").css({
		"position": "absolute",				   
		"top": windowHeight/2-popupHeight/2,
		"left": windowWidth/2-popupWidth/2
	});
	$("#backgroundPopup").css({
		"height": '100%'
	});
}

/**
 * define functions when the document is loaded
 */
$(document).ready(function(){

	$("#popupContactClose").click(function(){
		disablePopup();
	});
	$("#backgroundPopup").click(function(){
		disablePopup();
	});
	$(document).keypress(function(e){
		if(e.keyCode==27 || popupStatus==1){
			disablePopup();
		}
	});
});