PhoneGap将图像上传到表单提交服务器

I am facing problem here as in phonegap image is uploaded to the server once u select a picture.I don't want to upload image before submitting form. Image is uploaded automatically to server which is something i don't want.I want to upload image with the form, where form contains many more fields which is required to send along with image. What are the possible ways to submit with form? I am facing problem here as in phonegap image i