How do I hide/show fields based on a selection from a drop-down menu using jQuery?

I have been tryign to find code using google to figure this out but there seem to be no good examples of how to accomplish this. I have a form built in SharePoint that I would like to display certain fields based on a selection from a drop down menu. If someone could point me in the right direction it would be greatly appreciated.
Yvonne Todd-OfreneoAsked:
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Prakash SamariyaIT ProfessionalCommented:
Please try like this jQuery sample  
      }else if($(this).attr("value")=="hide"){
Mandeep SinghDatabase AdministratorCommented:

May it give you an idea, how to do this. It not for show/hide. It's for enable and disable of controls through javascript.

In which you can replace disabled with hide.
Yvonne Todd-OfreneoAuthor Commented:
I tried using this code and I can't seem to get it to work. When I run the code on the Edit form nothing happens. Am I missing something?

       var field1;   //Directorate

       var selectedTypePur = $("select[title = 'Request Type']").val();
       if (selectedTypePur == "Other")
               field1 = GetControl("Directorate");
     "";      //show
               field1 = GetControl("Directorate");
     "none";      //hide
Prakash SamariyaIT ProfessionalCommented:
What this function returns GetControl("Directorate");?

jQuery objects do not have a "parentNode" property. That is for working with DOM elements. You can use like below

OR if it returns jQuery object, use it like
control.parent().parent().parent().css('display', 'none');

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Yvonne Todd-OfreneoAuthor Commented:
If a selection is made from the "Request Type" field, in this case it is "Other" i want fields to be displayed like "Directorate". If another Selection like "Purchase order is chosen from "Request Type", i want to hide fields Like "Directorate" from view.

I will try the code you provided above in the morning to see if it works. Thank for letting my know i was using incorrect syntax.
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