<br><CENTER><FORM NAME="Calc"><TABLE BORDER=4><TR><TD><INPUT TYPE="text" NAME="Input" Size="16"><br></TD></TR><TR><TD><INPUT TYPE="button" NAME="one" VALUE=" 1 "" OnClick="Calc.Input.value += '1'"><INPUT TYPE="button" NAME="two" VALUE=" 2 "" OnCLick="Calc.Input.value += '2'"><INPUT TYPE="button" NAME="three" VALUE=" 3 "" OnClick="Calc.Input.value += '3'"><INPUT TYPE="button" NAME="plus" VALUE=" + "" OnClick="Calc.Input.value += ' + '"><br><INPUT TYPE="button" NAME="four" VALUE=" 4 "" OnClick="Calc.Input.value += '4'"><INPUT TYPE="button" NAME="five" VALUE=" 5 "" OnCLick="Calc.Input.value += '5'"><INPUT TYPE="button" NAME="six" VALUE=" 6 "" OnClick="Calc.Input.value += '6'"><INPUT TYPE="button" NAME="minus" VALUE=" - "" OnClick="Calc.Input.value += ' - '"><br><INPUT TYPE="button" NAME="seven" VALUE=" 7 "" OnClick="Calc.Input.value += '7'"><INPUT TYPE="button" NAME="eight" VALUE=" 8 "" OnCLick="Calc.Input.value += '8'"><INPUT TYPE="button" NAME="nine" VALUE=" 9 "" OnClick="Calc.Input.value += '9'"><INPUT TYPE="button" NAME="times" VALUE=" x "" OnClick="Calc.Input.value += ' * '"><br><INPUT TYPE="button" NAME="clear" VALUE=" c "" OnClick="Calc.Input.value = ''"><INPUT TYPE="button" NAME="zero" VaLUE=" 0 "" OnClick="Calc.Input.value += '0'"><INPUT TYPE="button" NAME="DoIt" VALUE=" = "" OnClick="Calc.Input.value = eval(Calc.Input.value)"><INPUT TYPE="button" NAME="div" VALUE=" / "" OnClick="Calc.Input.value += ' / '"><br></TD></TR></TABLE></FORM></CENTER>

에고 소스정리가 안됐네요 그냥 이소스 붙히시면 되요.

출처: 맑은숲님 홈