function popupWindow(theURL, theWidth, theHeight) { 
  popupwindow=window.open(theURL,'popupwindow','status=no,menubar=no,scrollbars=yes,resizable=yes,width=' + theWidth + ',height=' + theHeight);
  popupwindow.focus();
}

function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}
function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}