colori=["#c0c0c0","0000ff"];

function flipColor(id,c){
   	if(!document.getElementById) exit;
   	obj=document.getElementById(id);
	objdx=document.getElementById(id+"dx");
	d=0;
	if(c>0){
		d=1;
		objdx.innerHTML="<img src='../index_file/bottone.gif' width='18' height='15' border='0' align='middle'>";
	}else{
		objdx.innerHTML="";
	}
   	obj.bgColor=colori[d];
}