windows open Pop-up window and the same window opens a new tab page

<! DOCTYPE html>Baidu a bit</a> <!--onclick = ' return false ', click Not to jump--<script type= "Text/javascript" >//Auxiliary Functions            varAddloadevent =function(func) {varOldonload =window.onload; //Save the existing, if there is already                if(typeofWindow.onload!== ' function ') {window.onload=func; } Else{window.onload=function() {oldonload ();                    Func ();            }}} addloadevent (Preparelinks); //Main function            functionpreparelinks () {//It is expressed here as var preparelinks = function () {, the function is invalid, so it does not run???                 if(!document.getelementsbytagname)return false; varLinks =document.getelementsbytagname (' a ');  for(vari = 0; i < links.length; i++) {                    if(Links[i].getattribute (' class ') = = ' Popup ') {                        //contains a judgment on the existence of ' popup 'Links[i].onclick =function(){                            returnPopUp ( This. getattribute ("href"))?false:true; //return!popup (This.getattribute ("href"));                        }                    }                }            }            //Click the link does not jump page, pop-up window            varPopUp =function(Winurl) {window.open (Winurl,"Popup", "Resizable,scrollbars,status"); return true; }            //if the popUp is changed to the following, click on the link to open the New tab page in the same window            //var popUp = function (winurl) {            //window.open (winurl, ' _blank ');            //return true;            // }</script> </body>
windows open Pop-up window and the same window opens a new tab page