function doCouplet(){
	if(document.body.offsetWidth>800){	
	couplet_left.style.visibility='visible';
	couplet_right.style.visibility='visible';	  
	  couplet_left.style.top=80;
	  couplet_left.style.left=5;
	  couplet_right.style.top=1;
	  couplet_right.style.right=5;
	}
}