var fileobj;
function upload_file(e) 
{
        e.preventDefault();
        fileobj = e.dataTransfer.files[0];
        ajax_file_upload(fileobj);
}

function file_explorer() {
        document.getElementById('uploadfile').click();
        document.getElementById('uploadfile').onchange = function() 
        {
                fileobj = document.getElementById('uploadfile').files[0];
                ajax_file_upload(fileobj);
        };
}

function copytoclipboard() 
{
        var elm = document.getElementById("divresponse");
        var selection = window.getSelection();
        var range = document.createRange();
        range.selectNodeContents(elm);
        selection.removeAllRanges();
        selection.addRange(range);
        document.execCommand("Copy");
}

function ajax_file_upload(file_obj) 
{
        var divresponse = document.getElementById('divresponse');
        divresponse.innerHTML = "Uploading file..." ;
        $.ajax(
        {
                type: 'PUT',
                url: 'index.php',
                contentType: false,
                processData: false,
                data: file_obj,
                success:function(response) 
                {;
                        divresponse.innerHTML = response ;
                        document.getElementById('copytoclipboard').style.visibility = "visible";
                }
        });

}