var MSIE=navigator.userAgent.indexOf("MSIE");
var OPER=navigator.userAgent.indexOf("Opera");

function adshowCouplet(){
	if((document.body.offsetWidth>800) && MSIE!=-1 && OPER==-1 && ifCouplet){	
	//couplet_left.style.visibility='visible';
	couplet_right.style.visibility='visible';	  
	 // couplet_left.style.top=20;
	 // couplet_left.style.left=5;
	  couplet_right.style.top=30;
	  couplet_right.style.right=5;
	}else{
		//couplet_left.style.visibility='hidden';
		couplet_right.style.visibility='hidden';
	}
	setTimeout("adshowCouplet();",50)
}