HTML页面跳转及参数传递问题

function setCookie(cname,cvalue){

    document.cookie = cname + "=" + cvalue;

}

function getCookie(cname){

    var name = cname + "=";

    var ca = document.cookie;

}

var p = doucment.getElementById('要获取字符串的p ID名');

localStorage.string = p.textContent;

var p = doucment.getElementById('要写入的p ID名');

p.textContent = localStorage.string;

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

window.open("子页面.html");

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