//<![CDATA[

function display_time()
	{
		a = window.document.aufgabe;
 
		if (a.start.value == 0)
		{
			zeit			= new Date();
			start			= zeit.getTime();
			a.start.value	= start;
			display_time();
		}
		else
		{
			limit		= parseFloat(a.limit_mins.value) * 60 + parseFloat(a.limit_secs.value);
			lcont		= parseFloat(a.lcont.value);
			neuezeit	= new Date();
 
			if (a.lcont.value == 0)
			{
				asecs	= limit - Math.round(((neuezeit.getTime() - start)/1000.0));
				stext	= "Verbleibende Zeit: ";
				sflag	= "";
				if (asecs == -1)
				{
					a.lcont.value = 0;
					alert("Die Zeit für die Aufgabe ist abgelaufen! \n \n bitte ok-Button drücken, um zur Auswertung zu gelangen");
					zeit	= new Date();
					start	= zeit.getTime();
					asecs = 0;
					a.submit();
				}
 
			}
			else
			{
				asecs	= Math.round(((neuezeit.getTime() - start)/1000.0));
				stext	= "Verstrichene Zeit: Limit + ";
				sflag	= "+";
			}
 
			isecs		= asecs % 60;
			imins		= (asecs - isecs) / 60;
			dsecs		= "" + ((isecs > 9) ? isecs : "0" + isecs);
			dmins		= "" + ((imins > 9) ? imins : "0" + imins);
			
			document.getElementById('seconds').value=asecs;
			
			a.zeit.value =  sflag + dmins + ":" + dsecs;
			window.status = stext + dmins + ":" + dsecs;
			window.setTimeout('display_time()',1000);
		}
	}
 
	function sub_chk() {
		b = window.document.aufgabe;
		if (b.start.value == 0) {
			
			b.chicken.focus();
			alert("\nSie haben die Stoppuhr nicht eingeschaltet!\n");
			return false;
			}
		else {
 
			return true;
			}
		}
//////////////////////////////////////////////////////////////////////
//]]>