My survey has around 200 reading paragraphs with each paragraph displayed on a page. I want to record the date the subject visited each page/paragraph. If the date the subject visited page N is different from that of page N+1, then I would ask them a few questions in a block called 'experience block'. The issue I am having now is that, in the survey flow, I have to do the above 'if then' condition check after each page. Since I have 200 pages/paragraphs, I do it 200 times in the survey flow. Now I am going to extend the length of pages/paragraphs to 300. I do not want to repeat 'if then' hundreds of times again in the survey flow. I am asking for help if there is any shortcut, convenient way that I can do to avoid writing 'if then' hundreds of times in the survey flow? I guess something like writing the 'if then' within a for loop function which runs on every page would be a solution. I wonder is there a solution like this? If so, where I can write this for loop function? 
Pei_2009 - You can reduce some work in your survey flow by using JS. We can add JS in every paragraph question to check for this date condition and accordingly set an embedded data (for eg., displayExperienceBlock) to either 'Yes' or 'No' in the survey flow. Then you can just duplicate this branch condition and add it after every paragraph.
Following JS is to be added to first paragraph:
************JS starts here***************
Qualtrics.SurveyEngine.addOnReady(function()
{
var currentParaDate = "${date://CurrentDate/SL}";
Qualtrics.SurveyEngine.setEmbeddedData("previousParaDate", currentParaDate);
});
***********JS ends here*******
Following JS is to be added to subsequent paragraphs:
************JS starts here***************
Qualtrics.SurveyEngine.addOnReady(function()
{
var previousParaDate = "${e://Field/previousParaDate}";
var currentParaDate = "${date://CurrentDate/SL}";
if (previousParaDate == currentParaDate) {
Qualtrics.SurveyEngine.setEmbeddedData("previousParaDate", currentParaDate);
Qualtrics.SurveyEngine.setEmbeddedData("displayExperience", "No");
}
else {
Qualtrics.SurveyEngine.setEmbeddedData("previousParaDate", currentParaDate);
Qualtrics.SurveyEngine.setEmbeddedData("displayExperience", "Yes");
}
});
***********JS ends here*
Your survey flow will look as follows:
@Mishraji
That is great! Can I even use JS to reduce the repeated work of 'if displayExperience==Yes, then show Block: Experience'? I mean can I write inside Qualtrics.SurveyEngine.addOnReady(function() a code like
if (${e://Field/displayExperience}==Yes)
{ShowBlock: Experience}
The key thing here is I don't know if there exists a Qualtrics API method "ShowBlock". If there exists, how we could call this function to show a specific block via its name?
Pei_2009 - Not sure if that is doable. I did not find anything on skipping blocks on community.
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