javascript - change selected option of dropDown using jQuery -

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i have dropdown on change popup appears warning change value affects. when user select no dropdown selected index supposed return initial selected option. here do:

function closedeletevariantspopup(){         parent.$.fn.colorbox.close();         var elementspecies= parent.document.getelementsbyclassname("speice");         for(var = 0;i<elementspecies[0].options.length; ++i) {             alert(parent.document.getelementbyid("specieshiddenvalue").value);             if(elementspecies[0].options[i].id === parent.document.getelementbyid("specieshiddenvalue").value) {                 alert(parent.document.getelementbyid("specieshiddenvalue").value);                 elementspecies[0].selectedindex = i;                 break;             }         }     }

html & freemarker:

[@spring.bind "genomicreferencebean.specie.id"/] <select name="specie.id" id="specie.id"  [#if !(genomicreferencebean.specie?has_content) || genomicreferencebean.specie.id==-1] multiple="multiple" [/#if] class='speice singlelist'  onchange='getmaterials()' > [#if genomicreferenceinitializerbean.species?has_content]     [#list genomicreferenceinitializerbean.species initializervaluebean]         <option for="selectspecie" name="${initializervaluebean.name}" [#if genomicreferencebean.specie?has_content && genomicreferencebean.specie.id?number == initializervaluebean.id] selected="selected" [/#if] value="${initializervaluebean.id}">${initializervaluebean.name}</option>     [/#list] [/#if]  </select> <input type="hidden" id="specieshiddenvalue" value="${genomicreferencebean.specie.id?number}"/>

now when press no button popup close , nothing happen

i used jquery , worked fine:

parent.$(".speice option").each(function(){             if($(this).val() === parent.document.getelementbyid("specieshiddenvalue").value) {                 $(this).attr('selected', 'selected');             }         });

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