function pop_up(url,wid,hei){ //ÀÎÀÚ´Â Æ˾÷½Ãų ÆäÀÌÁöÀ̸§
 xpos = (screen.availWidth - wid) /2;
 ypos = (screen.availHeight - hei) /2;
 window.open(url,'Å·½º¹ÙµÏ','width='+wid+',height='+hei+',left='+xpos+',top='+ypos,toolbar=0, directories=0, status=0, menubar=0, scrollbars=0, resizable=0);
}