// LED-Strip calculator

  function my_onclick()
  {

	  lengthmtr_val = eval(document.ledstripcalculator.length.value);
	  currentmtr_val = eval(document.ledstripcalculator.currentmtr.value);
	  voltage_val = eval(document.ledstripcalculator.voltage.value);

	  currenttot_val = lengthmtr_val * currentmtr_val;
	  powertot_val = voltage_val * currenttot_val;

    document.ledstripcalculator.currenttot.value = Math.round(currenttot_val * 10000) / 10000;
    document.ledstripcalculator.powertot.value = Math.round(powertot_val * 10000) / 10000;

	DynamicTextObjectPS.firstChild.nodeValue="A";
  }

  document.ledstripcalculator.mybutton.onclick = my_onclick;