function openwin(url){
	window.open(url, "win", "width=700,height=650,status=no,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=no,titlebar=no");
}


/*　表示・非表示　*/

var i=0;
function disp(){
 if(i%2==0)
  document.getElementById("preview").style.display="block";
 else
  document.getElementById("preview").style.display="none";
 i++;
}