html body script document createElement div document body appendChild

  • Anonymous
  • Text only
  • 23 Apr 2014 
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<html>

<body>

	<script>

		d = document.createElement('div');

		document.body.appendChild(d);

		

		var frm = document.createElement('form');

		d.appendChild(frm);

		

		var now_input = document.createElement('input');

		now_input.id = 'input';

		document.body.appendChild(now_input);

		

		var now_input = document.createElement('input');

		now_input.id = 'answer';

		document.body.appendChild(now_input);

		

		var btn = document.createElement('button');

		btn.appendChild(document.createTextNode('Счет'));

		frm.appendChild(btn);

		

		btn.onclick = function calculate()

		{

			

			var input = document.getElementById('input').value;



			var arr = input.split('+');

			if (arr.length > 1)

				document.getElementById('answer').value = parseInt(arr[0]) + parseInt(arr[1]);

				

			var arr = input.split('*');

			if (arr.length > 1)

				document.getElementById('answer').value = parseInt(arr[0]) * parseInt(arr[1]);

		

			var arr = input.split('/');

			if (arr.length > 1)

				document.getElementById('answer').value = parseInt(arr[0]) / parseInt(arr[1]);

			

			var arr = input.split('-');

			if (arr.length > 1)

				document.getElementById('answer').value = parseInt(arr[0]) - parseInt(arr[1]);

		}

	</script>

</body>



</html>
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