function setImgFileThumbnail(file,target) {
    var fileNm = file.name;
    var filesize = Math.round(file.size / 1024) + "KB";
    var reader = new FileReader();

    reader.onload = function (e) {
        var img = document.createElement("img");
        img.setAttribute("src", e.target.result);
        target.parent().find('.preview-area').children('img').remove();
        target.parent().find('.preview-area').html(img);
    };

    reader.readAsDataURL(file);
    if(target.parents('.file-add-area').find('.item-area').length < 1){
        var html = '<div class="item-area">\n' +
            '\t\t\t\t\t\t\t\t\t\t<div class="item">\n' +
            '\t\t\t\t\t\t\t\t\t\t\t<p class="txt">'+fileNm+'</p>\n' +
            '\t\t\t\t\t\t\t\t\t\t\t<button type="button" class="ico-sm-close btn-del" onclick="delImgFile(this)"><span class="txt-hide">삭제</span></button>\n' +
            '\t\t\t\t\t\t\t\t\t\t</div>\n' +
            '\t\t\t\t\t\t\t\t\t</div>'
    target.parents('.file-add-area').append(html);
    }else{
        target.parents('.file-add-area').find('.item-area .item .txt').text(fileNm);
    }
}

function validImgFile(file){
    var ext = file.val().split('.').pop().toLowerCase();

    if($.inArray(ext, ['png','jpg','jpeg','svg','gif']) == -1) {
        alert('이미지 파일만 등록가능합니다.');
        file.val("");
        return false;
    }
    return true;
}