var win = null;
function NewWindow(mypage,myname,w,h,scroll)
	{
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable';
	win = window.open(mypage,myname,settings);
	if(win.window.focus)
		{
		win.window.focus();
		}
	}

function dropdown_value(feldname)
	{
	var feld = window.document.getElementsByName(feldname)[0];
	return(feld.value);
	}
	
function value_as_int(feldname)
	{
	var feld = window.document.getElementsByName(feldname)[0];
	var my_result = new Number(feld.value);
	return(my_result);
	}
	
function open_calendar(feld)
	{
	var wert = document.getElementsByName(feld)[0].value;
	NewWindow('calendar.exe?PAGE=calendar.htm&VARNAME='+feld+'&DATE='+wert+'&DAYS=MODIMIDOFRSASO', 'calendar', 285, 305, 'no', 'no');
	}