function yearsInExistence() {
                            var today=new Date();
                            var founded = new Date(2000,0,1);
                            var yearsExp=((Date.parse(today)-Date.parse(founded))/1000/3600/24/365.25);  //No. of years elapsed since end of 1999  
                            if (document.getElementById('yearsExp')) {
                                    document.getElementById('yearsExp').innerHTML=Math.ceil(yearsExp);
                                    return;
                                    }
                            else {
                            if ((document.getElementById('yearsExp1')) && (document.getElementById('yearsExp2'))) {
                                    document.getElementById('yearsExp1').innerHTML=Math.ceil(yearsExp);
                                    document.getElementById('yearsExp2').innerHTML=Math.ceil(yearsExp);
                            }
                            else {return;}
                            }
                            }