How Hide each children div with substring of id?

<div id="mydiv" class="table-responsive">
   <table class="table">
	<tr>
	   <th>
		@Html.DisplayNameFor(item_ => item_.Language.Name)
	   </th>
	   <th>
	        @Html.DisplayNameFor(item_ => item_.LanguageLevel.Name)
	   </th>
	   <th></th>
	</tr>
	     @foreach (var item in Model)
		{
		   <tr>
		     <td>
			<div id="divLanguage_@item.LanguageID">
			    @Html.DisplayFor(modelItem => item.Language.Name)
			</div>

			<div id="divDDLanguage_@item.LanguageID">
		             @Html.DropDownList("LanguageID", new SelectList((ViewBag.Languages), "LanguageID", "Name", item.LanguageID), new { onchange = "ChangeLanguage(this," + item.EmployeeLanguageID + ")" })
			</div>

		     </td>
		     <td>

			<div id="divLanguageLevel_@item.ProfeciencyLevel">
			     @Html.DisplayFor(modelItem => item.LanguageLevel.Name)
			</div>

			<div id="divDDLanguageLevel_@item.LanguageID">
			     @Html.DropDownList("LanguageLevelID", new SelectList(ViewBag.LanguageLevels, "LanguageLevelID", "Name", item.ProfeciencyLevel), new { onchange = "ChangeLanguageLevel(this," + item.LanguageID + ")" })
			</div>

		      </td>
		   </tr>
		   }
   </table>
</div>