$(document).ready(function(){
  
    $('table div[id^="documents_"]').hide(); //hide all div elements with id "documents" hich are inside a table element.

    $("a").click(function()
    {
      	var element = this.id; //store a.id in variable
		
		var doc_element=document.getElementById("documents_"+element);
		
		if(doc_element!=null && doc_element!=undefined)
		{
            if(doc_element.style.display == "block")
            {
                $("div."+element).hide("slow"); //hide div with id
                $(this).toggleClass("retract");
            }
            else
            {
                $("div."+element).show("slow"); //show div with id
                $(this).toggleClass("retract");
            }
         	return false;
         }
            

    }).end();

});