uploading pictures

[nuttybutty1]

I cant upload pictures to an application form.They say the size should be 1MB what the hells that and is is do many mega pixels

[rojash]

1MB is approximately 1000 KB (depending of the definition). It is a measure of the size of the file you want to upload. It does not directly correlate to Megapixels. The size of the file will depend on:
1 The resolution
2. The colour depth
3. The amount and type of compression applied
4. The compressibility of the image - for example an image that is mostly uniform in colour (say, a sky) will compress much more than a highly detailed image.

You need to load your image into an editor and experiment saving it at various resolutions and compression ratios.