gistfile1.js

//    "default_popup": "window.html",
$(document).ready(function () {
    onWindowLoad();
});

	function onWindowLoad() {
        $("#boxUrl").attr('src','https://readingpack.com/includes/extension/?p='+GetQueryStringParams('p')+'&url='+content.location.href+'');
    /*
	  chrome.tabs.query({
	    'active': true,
	    'windowId': chrome.windows.WINDOW_ID_CURRENT
	  }, function(tab) {
		
	  	  $("#boxUrl").attr('src','https://readingpack.com/includes/extension/?p='+GetQueryStringParams('p')+'&url='+escape(tab[0].url));
		 
	  });
    */
	}

	function GetQueryStringParams(sParam) {
    var sPageURL = window.location.search.substring(1);
    var sURLVariables = sPageURL.split('&');
    var returnTo;

    for (var i = 0; i < sURLVariables.length; i++) {
        var sParameterName = sURLVariables[i].split('=');
        if (sParameterName[0] == sParam) {
            returnTo = sParameterName[1];
        }
    }
    if(!returnTo) returnTo = "";
    
    return returnTo;
}