label for can't using

click label focus will at input  but it is not like this
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<label id="quo_no_t" for="quo_no"><span class="labelContent" itdept-ui="true">Quotation No.</span>: </label>

but input no id  not general quo_no

<span class="textbox" style="width: 138px; height: 20px;"><input type="text" autocomplete="off" class="textbox-text validatebox-text" placeholder="" style="margin-left: 0px; margin-right: 0px; padding-top: 2px; padding-bottom: 2px; width: 130px;"><input type="hidden" class="textbox-value" name="quo_no" value="qqq"></span>

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i using html helper

C#
   var lhtml_quo_no            = Html.itUI().UITextbox("quo_no", ls_module, "").multiLine(false);
  @lhtml_quo_no.td(1, 2).label("sales.label.quo_no").tabIndex(1) <-- here

HTML
<input type="text" value="" (tabindex="1" here is not good ) ng-model="cntrl_data.maint.sch_crit.quo_no" ittextbox="" id="quo_no" data-itdept-type="itTextbox" data-itdept-options="&quot;width&quot;:140,&quot;width&quot;:140" class="ng-untouched ng-valid textbox-f ng-dirty ng-valid-parse" style="display: none;" textboxname="quo_no" itdept-ui="true">

this html can't not found  tabindex
<input type="text" autocomplete="off" class="textbox-text validatebox-text" placeholder="" style="margin-left: 0px; margin-right: 0px; padding-top: 2px; padding-bottom: 2px; width: 130px;">

 

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