var collapsed = true;

var displayImagesHidden = false;

var previousPageYOffset = -1;

var setScrollPositionInterval;

function collapseHeader(sendEvent) {

    if (sendEvent) {

        location.href = "cmail://collapseHeader/";

        }

    collapsed = true;

    handleHeaderDisplay('expanded_header', 'collapsed_header');

    updateHeader();

    }

function expandHeader(sendEvent) {

    if (sendEvent) {

        location.href = "cmail://expandHeader/";

        }

    collapsed = false;

    handleHeaderDisplay('collapsed_header', 'expanded_header');

    updateHeader();

    }

function updateHeader() {

    var rows = "40%, *";

    if (collapsed) {

        if (displayImagesHidden || (parent.header_frame.g_autoLoadImages != 0) || (parent.hiddenCount == 0)) {

            rows = "10%, *";

        } else {

            rows = "17%, *";

            }

        }

    parent.document.getElementById('email_frameSet').rows = rows;

    }

function handleHeaderDisplay( tableToHide, tableToShow ) {

    document.getElementById(tableToHide).style.display = 'none';

    document.getElementById(tableToShow).style.display = '';

    }

function init(scrollPos) {

    if (document.getElementById('collapsed_header').style.display != 'none') {

        collapseHeader(false);

    } else {

        expandHeader(false);

    }

    window.scrollTo(0, scrollPos);

    setScrollPositionInterval = setInterval("updateScrollPosition()", 500);

    }

function displayImagesButtonPressed() {

    hideDisplayImagesButton();

    parent.restoreImages("body_frame");

    requestDisplayImages();

}

function hideDisplayImagesButton() {

	document.getElementById("displayImagesTable").style.display = "none";

    displayImagesHidden = true;

    updateHeader();

}

function showDisplayImagesButton() {

	document.getElementById("displayImagesTable").style.display = "";

    displayImagesHidden = false;

    updateHeader();

}

function requestDisplayImages() {

    location.href = "cmail://displayImages/";

}

function updateScrollPosition() {

    if (previousPageYOffset != parent.pageYOffset) {

        previousPageYOffset = parent.pageYOffset;

        location.href = "cmail://body/" + previousPageYOffset;

    }

}