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//<script language="JavaScript">
 var timeout     = 500;
 var closetimer  = 0;
 var ddmenuitem  = 0;
 
 // open hidden layer
 function mopen(id)
 {
 // cancel close timer
 mcancelclosetime();
 
 // close old layer
 if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
 
 // get new layer and show it
 ddmenuitem = document.getElementById(id);
 ddmenuitem.style.visibility = 'visible';
 }
 // close showed layer
 function mclose()
 {
 if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
 }
 
 // go close timer
 function mclosetime()
 {
 closetimer = window.setTimeout(mclose, timeout);
 }
 
 // cancel close timer
 function mcancelclosetime()
 {
 if(closetimer)
 {
 window.clearTimeout(closetimer);
 closetimer = null;
 }
 }
 
 // close layer when click-out
 document.onclick = mclose;
 
 //</script>
 
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