Remove image attributes

hi guys.. hope i didn’t wrong thred to find some help..

to the point, is there any way to remove image height

and width attribute from generated image tag of the_post_thumbnail

or get_the_post_thumbnail function.. i need to remove it

because i’ve to make my header ( my related thumbnail post goes

to header ) auto resize conditionally based on browser size. even

i know what to do with css, but i’ve to remove it.. or there is

some thread that has been discuss it yet? thanks before..