تالار گفتمان nCIS.ir

<input id="n1" type="text" />
<input id="n2" type="text" />
<input id="n3" type="text" />
<input id="n4" type="text" />
<button onclick="calc()"> calculate </button>

<script type="text/javascript">

	function calc(){
		n1 = parseFloat(document.getElementById('n1').value);
		n2 = parseFloat(document.getElementById('n2').value);
		n3 = parseFloat(document.getElementById('n3').value);
		n4 = parseFloat(document.getElementById('n4').value);
		
		n = n1+n2+n3+n4;
		
		alert(n/4);
		
	}

</script>