function hayCriterioComb (c1, c2, c3, c4, c5, c6, c7) {

		var a = c1.value.length;
		var b = c2.value.length;
		var c = c3.value.length;
		var d = c4.value.length;
		var e = c5.value.length;
		var f = c6.value.length;
		var g = c7.value.length;

		if (a == 0 && b == 0 && c == 0 && d == 0 && e == 0 && f == 0 && g == 0){
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarComb (c1, c2, c3, c4, c5, c6, c7);
			event.returnValue = false;
			return false;
		}

		var hay = true;
		var i;
		var sp = "";

		for (i=0; i<a; i++){
			sp = sp + " ";
		}

		if (c1.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<b; i++){
			sp = sp + " ";
		}
		if (c2.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<c; i++){
			sp = sp + " ";
		}

		if (c3.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<d; i++){
			sp = sp + " ";
		}

		if (c4.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<e; i++){
			sp = sp + " ";
		}

		if (c5.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<f; i++){
			sp = sp + " ";
		}

		if (c6.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<g; i++){
			sp = sp + " ";
		}

		if (c7.value == sp){
			hay = false;
		}
		else {return true;}

		if (hay == false){
			event.returnValue = false;
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarComb (c1, c2, c3, c4, c5, c6, c7);
		}
		return hay;
	}

	function hayCriterioAdq (c1, c2, c3) {

		var a = c1.value.length;
		var b = c2.value.length;
		var c = c3.value.length;

		if (a == 0 && b == 0 && c == 0){
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarCardex (c1, c2, c3);
			event.returnValue = false;
			return false;
		}

		var hay = true;
		var i;
		var sp = "";

		for (i=0; i<a; i++){
			sp = sp + " ";
		}

		if (c1.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<b; i++){
			sp = sp + " ";
		}
		if (c2.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<c; i++){
			sp = sp + " ";
		}

		if (c3.value == sp){
			hay = false;
		}
		else {return true;}

		if (hay == false){
			event.returnValue = false;
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarAdq (c1, c2, c3);
		}
		return hay;
	}


	function hayCriterioCardex (c1, c2, c3) {

		var a = c1.value.length;
		var b = c2.value.length;
		var c = c3.value.length;

		if (a == 0 && b == 0 && c == 0){
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarCardex (c1, c2, c3);
			event.returnValue = false;
			return false;
		}

		var hay = true;
		var i;
		var sp = "";

		for (i=0; i<a; i++){
			sp = sp + " ";
		}

		if (c1.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<b; i++){
			sp = sp + " ";
		}
		if (c2.value == sp){
			hay = false;
		}
		else {return true;}

		sp = "";
		for (i=0; i<c; i++){
			sp = sp + " ";
		}

		if (c3.value == sp){
			hay = false;
		}
		else {return true;}

		if (hay == false){
			event.returnValue = false;
			alert ("No hubo criterios de selección. Intentelo de nuevo.");
			limpiarCardex (c1, c2, c3);
		}
		return hay;
	}