//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");
        $("#popupDiv").fadeIn("slow");
        popupStatus = 1;
    }
}

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

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

    $("#backgroundPopup").css({
        "width": windowWidth,
        "height": windowHeight
    });

}

var largeAltSrc = "";
/* Change main alternate image 
 * If there is an alternate to swap to, show the alt
 *  otherwise, show the original large image
*/
function setAltJumbo(whichImage) {
    if (whichImage != null)
        $("#largeAlt").attr("src",whichImage);
    else
        $("#largeAlt").attr("src", largeAltSrc);
}

$(document).ready(function() {
    //LOADING POPUP
    //Click the button event!
    $("a.popopLink").click(function() {
        //centering with css
        centerPopup();
        //load popup
        loadPopup();
    });

    //get original largeAlt Src
    largeAltSrc = $("#largeAlt").attr("src");
    
    //CLOSING POPUP
    //Click the x event!
    $("#popupDivClose").click(function() {
        disablePopup();
    });
    //Click out event!
    $("#backgroundPopup").click(function() {
        disablePopup();
    });
    //Press Escape event!
    $(document).keypress(function(e) {
        if (e.keyCode == 27 && popupStatus == 1) {
            disablePopup();
        }
    });

});