#function useFile filePath fileName fullPath=''>
    <#if fullPath?has_content>
       <#assign prefix=site.sitePath/>
    <#else>
       <#assign prefix=r'${site.sitePath}'/>
    #if>
    <#assign fileType=t.fileType(fileName)/>
    <#switch fileType>
        <#case 'image'>
            <#return ''/><#break>
        <#case 'video'>
            <#return ''/><#break>
        <#case 'audio'>
            <#return ''/><#break>
        <#default>
            <#assign fileSuffix = fileName?keep_after_last('.')/>
            <#switch fileSuffix>
                <#case 'css'>
                    <#return ''/><#break>
                <#case 'js'>
                    <#return ''/><#break>
                <#case 'ico'>
                    <#return ''/><#break>
                <#case 'rar'>
                <#case 'zip'>
                <#case 'html'>
                    <#return ''+fileName+''/><#break>
                <#default>
                    <#return prefix+filePath/>
            #switch>
    #switch>
#function >
${a.fileName}
<#else> <#if t.fileType(a.fileName) = 'image'>