open new tab when user click anywhere on the page only once
<p>i need some help about this, i want to know how to open new tab when user click anywhere on the page only once. It's for my blogger. I have this code:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script type="text/javascript"&gt;

    var popup = function() {

        window.open ("http://example.com", "Window","status=1,toolbar=1,width=500,height=300,resizable=yes");
    }

&lt;/script&gt;
&lt;body onclick="popup()"&gt;
    &lt;h1&gt;Click anywhere!&lt;/h1&gt;
&lt;/body&gt;</code></pre>
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</div>
</p>

<p>But doesn't work because every click open a new tab, i tried this code with cookies</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;SCRIPT LANGUAGE="JavaScript"&gt;

&lt;!-- Begin
var expDays = 1; // number of days the cookie should last

var page = "only-popup-once.html";
var windowprops = "width=300,height=200,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=yes";

function GetCookie (name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i &lt; clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break;
}
return null;
}
function SetCookie (name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc &gt; 2) ? argv[2] : null;
var path = (argc &gt; 3) ? argv[3] : null;
var domain = (argc &gt; 4) ? argv[4] : null;
var secure = (argc &gt; 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}
function DeleteCookie (name) {
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name);
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
function amt(){
var count = GetCookie('count')
if(count == null) {
SetCookie('count','1')
return 1
}
else {
var newcount = parseInt(count) + 1;
DeleteCookie('count')
SetCookie('count',newcount,exp)
return count
   }
}
function getCookieVal(offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

function checkCount() {
var count = GetCookie('count');
if (count == null) {
count=1;
SetCookie('count', count, exp);

window.open(page, "", windowprops);

}
else {
count++;
SetCookie('count', count, exp);
   }
}
//  End --&gt;
&lt;/script&gt;</code></pre>
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<p>But doesn't work because the browser blocks the popup.</p>

<p>Some sites like powvideo or animeflv had a script when the user click anywhere automatically open a new tab like data:text/html;base64,XXXXX </p>

<p>Thanks.</p>