// valideaza formul Calculator; [formCalculator] - form name
function validCalculator()
	{
		tip = document.formCalculator.tip;
		nr  = document.formCalculator.nr_buc;
		gr  = document.formCalculator.greutate;

		if ( tip.value == "-" )	{ alert('Selectati un tip !'); return false; }

		if ( nr.value == "" )  { alert('Completati campul NR. BUC !'); return false; }
		if ( isNaN(nr.value) ) { alert('Introduceti un numar la NR. BUC !'); return false; }

		if ( tip.value >= 4 ) // hardcoded; not a good idea, but ...
			{
				if ( gr.value == "" )  { alert('Completati campul GREUTATE !'); return false; }
				if ( isNaN(gr.value) ) { alert('Introduceti un numar la GREUTATE !'); return false; }
			}

	}

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