function check_all_for_checkitems()
{
	var checkitems = document.getElementById('checkitems');
	var items = checkitems.getElementsByTagName('input');

	var setcheckitems = document.getElementById('set_clear_checkitems');

	for(i=0; i<items.length; i++){
		if(items[i].name!='set_clear_checkitems'
		  && items[i].name!='sample_clear_checkitems'){
			if(setcheckitems.checked){
				items[i].checked = true;
			}else{
				items[i].checked = false;
			}
		}
	}
}

var newWinExpCheckItems = null
function openWinExplanationCheckItems()
{
	if(newWinExpCheckItems!=null && newWinExpCheckItems.closed!=true){
		newWinExpCheckItems.close()
	}
	newWinExpCheckItems = window.open("/info/checkitems.html","ExplanationCheckItems","left=0,top=0,width=550,height=250,scrollbars=yes,resizable=no")
}