function set_add(idName,check){
	var count;
	var chkLength = document.form1[idName].length;
	if(chkLength){
		for(count = 0; count < chkLength; count++){
			document.form1[idName][count].checked = check;
		}
	}else{
		document.form1[idName].checked = check;
	}
}