reloadAtSamePosition.js

/**
 * Provides data that can be used to ensure location.reload() behaves the same
 * with regard to x and y position across browsers
 *
 * Introduced because IE goes scroll 0 using window.location.reload, but stays in place for F5.
 *
 * @param {boolean} [forcedReload]
 *   Causes the page to always be reloaded from the server if true
 *
 * @see restoreToSamePosition
 *
 * NOTE: I tried overriding window.location.reload - browsers don't allow it
 */
function reloadAtSamePosition(forcedReload){
    if( !window.sessionStorage ){
        window.location.reload(forcedReload);
    }

    sessionStorage.setItem('window.position', jQuery(window).scrollTop());
    window.location.reload(forcedReload);
}

/**
 * Ensures location.reload() behaves the same
 * with regard to x and y position across browsers
 *
 * Introduced because IE is a bitch
 *
 * @see reloadAtSamePosition
 */
function restoreToSamePosition(){
    // Someday this could be done via cookies.. but the support is good enough now without
    if( !window.sessionStorage ){
        return;
    }

    var item = sessionStorage.getItem('window.position');
    if( !item ){
        return;
    }

    jQuery(window).scrollTop(item);
    sessionStorage.removeItem('window.position');
}