Save slider response as embedded data and NaN

Hi, I want to save a slider's response as embedded data and use it as the start position in next block's slider question.
Here is my code:
Qualtrics.SurveyEngine.addOnReady(function()
{
var qobj = this;
var qid = this.questionId;
jQuery( "#"+qid ).on('change', function(){
var response = parseInt(jQuery("#"+qid+"\\\\~1\\\\~true-result").val());
Qualtrics.SurveyEngine.setEmbeddedData("ResponseTime", response);
});  
});
But the embedded data ResponseTime is NaN. Can someone tell me what is the problem? I think the error is from
var response = parseInt(jQuery("#"+qid+"\\\\~1\\\\~true-result").val());
but how can I access the response of this slider question? many thanks!!
i also tried the following two, but none of them work:
var response = parseInt("${q://QID23/ChoiceNumericEntryValue/1}");

var response = this.getChoiceValue(1);
another question is how I can use javascript to set slider's start position?