function openPopup(theURL,winName,features,width,height) {
    var winWidth    = width;
    var winHeight   = height;
    var strWinSize  = ",width=" + winWidth + ",height=" + winHeight;

    if (window.screen) {
        var winPosL = (screen.availWidth - winWidth) / 2;
        var winPosT = (screen.availHeight - winHeight) / 2;
        strWinSize += ",left=" + winPosL + ",screenX=" + winPosL + ",top=" + winPosT + ",screenY=" + winPosT;
    }       
    
    window.open(theURL,winName,features + strWinSize);
}



function hide(id) {
	document.getElementById(id).style.display='none';
}

function show(id) {
	document.getElementById(id).style.display='block';
}



function getObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
    if(document.getElementById && document.getElementById(objectId)) {
        return document.getElementById(objectId);
    } else if (document.all && document.all(objectId)) {  
        return document.all(objectId);
    } else if (document.layers && document.layers[objectId]) { 
        return document.layers[objectId];
    } else {
        return false;
   }
}



function highlight(object) {
	object.parentNode.className = object.parentNode.className + ' active';
}

function clearing(object) {
	object.parentNode.className = object.parentNode.className.replace(new RegExp("active\\b"), "");
}