Friends, could you help me with this code and that is resulting in the same error?

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")} 


// Does a post request 

_SendExtend.postAjax = function (url, callback, data) { 
var ajaxRequest = _SendExtend.getAjaxRequest(callback); 
ajaxRequest.open("POST", url, true); 
ajaxRequest.setRequestHeader("Content-Type", "application/json"); 
ajaxRequest.setRequestHeader("Connection", "close"); 
ajaxRequest.send("data=" + encodeURIComponent(data)); 
}; 

// Returns an AJAX request obj 
_SendExtend.getAjaxRequest = function (callback) { 

var ajaxRequest; 

try { 
ajaxRequest = new XMLHttpRequest(); 
} catch (e) { 
try { 
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e) { 
try { 
ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (e) { 
return null; 
} 
} 
} 

ajaxRequest.onreadystatechange = function () { 
if (ajaxRequest.readyState == 4) { 
// Prob want to do some error or response checking, but for 
// this example just pass the responseText to our callback function 
callback(ajaxRequest.responseText); 
} 
}; 


return ajaxRequest; 

}; 


var _SendExtend = _SendExtend ? _SendExtend : new Object(); 


function processResponse(responseText) { 
// Response text is a json: 
//var obj = JSON.parse(responseText) // won't work all browsers, there are alternatives 

alert(‘Call succeeded ’ + responseText); 
} 

var jsonToPost = “"; 
//Here is where the variable would be replaced // + '[CRMAccountId]'; 
//TEST Environment 
var url = "https://boomiqa1.sanjuan.avalara.com/ws/rest/provisioning/admin/v1/extend/0011900000QNFO9AAP /“; 
//PRODUCTION Environment 
//var url = "https://boomiprod1.sanjuan.avalara.com/ws/rest/provisioning/admin/v1/extend/" + “[CRMAccountId]"; 

_SendExtend.postAjax(url, processResponse, jsonToPost);

We're simply trying to send the Account ID to an external end point.