HTML page jump and parameter transfer issues

window.open(url, "", "width=600,height=400");

window.location.href="https://www.jb51.net"; //Open the window in the same current window window.history.back(-1); //Return to the previous page <a href="http://www.baidu.net" target="_blank">

var obj = a.value; // Pass to pop-up page parameter var url = 'jxb.html?obj='+obj;
url = encodeURI(url);
window.open(url, "", "width=600,height=400");

var url = decodeURI(window.location.href);
var argsIndex = url .split("?obj=");
var arg = argsIndex[1];

function setCookie(cname,cvalue){
    document.cookie = cname + "=" + cvalue;
}
function getCookie(cname){
    var name = cname + "=";
    var ca = document.cookie;
}

var div = doucment.getElementById('DIV ID name to get the string');
localStorage.string = div.textContent;

var div = doucment.getElementById('DIV ID name to be written');
div.textContent = localStorage.string;

<input type="text" name="textfield" id="textfield"/>

window.open("subpage.html");

window.opener.document.getElementByIdx('textfield').value='123123123';