uploader.onAfterAddingFile = function (fileItem) {
        fileItem.file.remove = "Close";
        fileItem.file.caption = "Close";
        // start code of image compression
        var base64Image = null;
        var quality = 100;
        var reader = new FileReader();
        reader.onload = onLoadFile;
        reader.readAsDataURL(fileItem._file);
        var fileSize = ((fileItem.file.size / 1024) / 1024).toFixed(2);
          if(fileSize <= 1){
            quality = 100;
        }else if(fileSize >1 && fileSize<=2){
            quality = 80;
        }else if(fileSize >2 && fileSize<=3){
            quality = 70;
        }else if(fileSize >3 && fileSize<=4){
            quality = 50;
        }else if(fileSize >4 && fileSize<=5){
            quality = 40;
        }else if(fileSize >5 && fileSize<=6){
            quality = 30;
        }else if(fileSize >6 && fileSize<=7){
            quality = 25;
        }else if(fileSize >7 && fileSize<=8){
            quality = 20;
        }else if(fileSize >8 && fileSize<=9){
            quality = 10;
        }else if(fileSize >9 && fileSize<=10){
            quality = 5;
        }
        console.log(quality);
        var type = "image/jpeg";
        function onLoadFile(event) {
            var base64 = event.target.result.substring(event.target.result.indexOf(',') + 1, event.target.result.length);
            type = "image/jpeg";
            if (fileItem.file == "image/png") {
                type = "image/png";
            } else if (fileItem.file == "image/jpeg") {
                type = "image/jpeg";
            } else if (fileItem.file == "image/jpg") {
                type = "image/jpg";
            } else if (fileItem.file == "image/JPEG") {
                type = "image/JPEG";
            } else if (fileItem.file == "image/JPG") {
                type = "image/JPG";
            }
            var url = 'data:' + type + ';base64,' + base64;

            var img = new Image();
            img.onload = onLoadImage;
            img.src = event.target.result;
        }
        var canvas = document.createElement('canvas');
        function onLoadImage() {

            canvas.width = this.width;
            canvas.height = this.height;
            canvas.getContext('2d').drawImage(this, 0, 0, canvas.width, canvas.height);
            var newImageData = canvas.toDataURL(type, quality / 100);
            fileItem.file.base64Image = newImageData;
        }
        console.info('onAfterAddingFile', fileItem.file);
        // end code of image compression
    };