//SETTING UP OUR POPUP
//0 means disabled; 1 means enabled;
var popupStatus = 0;

//loading popup with jQuery magic!
function loadPopup(id) {

    var popupId = "popupContact";
    if (id)
        popupId = id;
    
    //loads popup only if it is disabled
    if (popupStatus == 0) {
        $("#backgroundPopup").css({
            "opacity": "0.7"
        });
        $("#backgroundPopup").fadeIn("slow");
        $("#" + popupId).fadeIn("slow");
        popupStatus = 1;
    }
}

//disabling popup with jQuery magic!
function disablePopup(id) {

    var popupId = "popupContact";
    if (id)
        popupId = id;
        
    //disables popup only if it is enabled
    if (popupStatus == 1) {
        $("#backgroundPopup").fadeOut("slow");
        $("#" + popupId).fadeOut("slow");
        popupStatus = 0;
    }
}

function centerHorizontally(topOffset, id) {

    var popupId = "popupContact";
    if (id)
        popupId = id;
        
    //request data for centering
    var windowHeight = document.documentElement.clientHeight;
    var windowWidth = document.documentElement.clientWidth;
    var popupWidth = $("#" + popupId).width();
    
    //centering
    $("#" + popupId).css({
        "position": "absolute",
        "top": ($(window).scrollTop() + topOffset) + "px",
        "left": ($(window).width() - popupWidth) / 2 + $(window).scrollLeft() + "px"
    });

    //only need force for IE6
    $("#backgroundPopup").css({
        "height": windowHeight
    });
}

function centerPopup(id) {

    var popupId = "popupContact";
    if (id)
        popupId = id;

    //request data for centering
    var windowWidth = document.documentElement.clientWidth;
    var windowHeight = document.documentElement.clientHeight;
    var popupHeight = $("#" + popupId).height();
    var popupWidth = $("#" + popupId).width();
    //centering
    $("#" + popupId).css({
        "position": "absolute",
        "top":  ($(window).height() - popupHeight ) / 2+$(window).scrollTop() + "px",
        "left": ( $(window).width() - popupWidth ) / 2+$(window).scrollLeft() + "px"
    });

    //only need force for IE6
    $("#backgroundPopup").css({
        "height": windowHeight
    });

}