var s_w = screen.availWidth;
 var s_h = screen.availHeight;

function siteWin () {

var win_w = 1500;
 var win_h = 1500;

    var elementsWin = window.open('size.html','elementsWin','width=1500,height=1500,scrollbars=auto,resizable=yes');
        elementsWin.focus();
}

function nxtPg() {
 window.location = "thnks.html";
}