<form action="/testresults/upload" method="post" enctype="multipart/form-data">
    <input type="file" id ='file' class="multi" accept="xml|csv|jpg" name="files[]"/>
    <input style="width:90px;height:40px;" type="button" value="Upload"  onclick='return onCheck()'/>
</form>

function onCheck()
{
    var path = document.getElementById("file").text;
    path = path.substring(path.lastIndexOf("\\")+1,path.length);
    alert(path);
    return false;

}