Image Size Resizead After Exporting to HTML as Image Maps

Greeting to all seniors,

i have make an art with dimensions 1200x400 pixels with image map links.

When i export this document with menu File>export for>Html then my actual image size always gone wrong at set to minimum size with links. 

when i apply manually codes width & height to the image then image maps gone wrong because of size changed.

I did apply many methods while exporting html dialog box with image size high, low and maximum but the problem persist.

Please help me out how to export actual size of my document Thanks.

Please find attached screen shots.