grails - Passing the value of textbox as form id -


trying pass value entered in textbox user id of form. code snippet below. passes params.id = "index" in controller. if hardcode form id="sometext" passes params.id = "sometext" controller. due constraints have use button element instead of g:actionsubmit. 

<g:form controller="search" action="index" id=${searchtext} method="post">     <div>         <g:textfield name="searchtext"></g:textfield>                 <button type="submit" class="btn">             <i class="icon-search"></i>          </button>     </div> </g:form>

any solutions?

<g:form controller="search" action="index" method="post">     <div>         <g:textfield name="id"></g:textfield>                <button type="submit" class="btn">             <i class="icon-search"></i>         </button>     </div> </g:form>

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