{if strlen({{sugarvar key='value' string=true}}) <= 0}
{assign var="value" value={{sugarvar key='default_value' string=true}} }
{else}
{assign var="value" value={{sugarvar key='value' string=true}} }
{/if}  
<input type='text' name='{{if empty($displayParams.idName)}}{{sugarvar key='name'}}{{else}}{{$displayParams.idName}}{{/if}}' 
    id='{{if empty($displayParams.idName)}}{{sugarvar key='name'}}{{else}}{{$displayParams.idName}}{{/if}}' size='{{$displayParams.size|default:30}}' 
    {{if isset($displayParams.maxlength)}}maxlength='{{$displayParams.maxlength}}'{{/if}} 
    value='{$value}' title='{{$vardef.help}}' tabindex='{{$tabindex}}' {{$displayParams.field}}>