function openPopUp(url, width, height, toolbar, scrollbars) {
  window.open(url, "popup", "status=0,toolbar=" + toolbar + ", scrollbars=" + scrollbars + ", width=" + width + ", height=" + height);
}

function showHideElement(elementID, force) {
    var element = document.getElementById(elementID);
    if(element != null) {
        if(force == "show") {
           element.style.display = "block";
        }
        else if(element.style.display == "" || element.style.display == "block" || force == "hide") {
           element.style.display = "none"; 
        }
        else {
           element.style.display = "block";
        }
    }
}