change body tag

[kbo004]

Ok, I am trying to change the styling of the body tag when the browser detects a certain screen resolution. This detects the resolution, but I can't get it to change the body. Please help.

 

 

 

function bodychange(){

document.body.style.margin-left = "0px";

document.body.style.margin-right = "0px";

}

if ((screen.width==1280) && (screen.height==1024)){

bodychange();

}