営業日の計算

function addBusinessDay( dt:Date, bizDay ){
	var counter = 1; // set to 1 to count from next business day
        var dtRet = new Date();
        dtRet.setTime(dt.getTime());
    
	while( bizDay>0 ){
	    var tmp = new Date();
	    tmp.setTime(dt.getTime());
	    tmp.setDate( tmp.getDate() + counter++ );
	    switch( tmp.getDay() ){
	    case 0:
	    case 6: 
        	break;// sunday & saturday
	    default:
        	bizDay--;
        	break;
            };
	}
	
	dtRet.setDate( dtRet.getDate() + (counter-1) );
	return dtRet;
}

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