Hi Winanjaya.
Please specify where is your image.
Do you have an url for this image?
If so you can just set "Asset" property for the image component with this URL. See how to do it: http://prntscr.com/3rah0i/direct
Also if you have this image in base64url format you can do the same as with URL.
May be you want to set image asset with JS code, so you can use code below:
precode
//Note "imageComponentName" - should be replaced with your image component name.
//Second parameter should be URL to your goal image or base64 image string.
Appery("imageComponentName").attr("src", "http://t0.gstatic.com/images?q=tbn:ANd9GcSppL4tXtAKthu5AQaARLMNEWT8JKhxdeSCdFYN1vEP5Fo-4YJ-xw");
/code/pre
Regards.