<HTML>
<Head> <CENTER>MATHEMATICA L OPERATION </HEAD>
<CENTER>
<FORM NAME="number" >
Number 1<INPUT TYPE="text" Value="" NAME="num1">
<BR>
Number 2<INPUT TYPE="text" Value="" NAME="num2">
</FORM>
//THIS IS THE ERROR!!
//THE RESULT SHUD NOT HAVE A TEXTBOX..
// THE NUMBER 1 AND NUMBER TWO VALUE SHUD NOT BE ERASED WHEN IT WILL BE ADD/ SUBTRATCT OR MULTIPLY..
<FORM NAME="number2" >
RESULT <INPUT TYPE="text" Value="0" NAME="numb4" >
</FORM>
</HEAD>
<body>
<SCRIPT><!--
function go(){
document.number. num1.value = ("0");
document.number2. numb4.value = ("");
}
var numb1 = document.number. num1.value
var numb2 = document.number. num2.value
function add(){
document.number2. numb4.value = parseInt(document. number.num1.. value) + parseInt(document. number.num2. value);
document.number. num1.value = ("");
document.number. num2.value = ("");
}
function mult(){
document.number2. numb4.value = (document.number. num1.value * document.number. num2.value) ;
document.number. num1.value = ("");
document.number. num2.value = ("");
}
function sub(){
document.number2. numb4.value = (document.number. num1.value - document.number. num2.value) ;
document.number. num1.value = ("");
document.number. num2.value = ("");
}
</SCRIPT>
<FORM NAME="MyForm" >
<INPUT TYPE="button" NAME="none" Value=" ADD " OnClick="add( )">
<INPUT TYPE="button" NAME="none5" Value=" SUBTRACT " OnClick="sub( )">
<INPUT TYPE="button" NAME="none3" Value=" MULTIPLY " OnClick="mult( )">
</FORM>
</CENTER>
</body>
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