Help me this question Who knoe how to do?/

Fisrt, insert:
1.a form with id="form1" :
--------------------------------> input type="form" id="form1"
2.testfields with id="num1" and "num2":
--------------------------------> input type="text" id="num1" ; input type="text" id="num2"
3.a button:
--------------------------------> input type="button" value="Add"
4.a reset button
--------------------------------> input type="reset" value="Reset"

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Then, add the funtion in script in head:

function AddNum(a,b) {

if (!isNaN(parseFloat(a)) && !isNaN(parseFloat(b))) {
//check if a and b are numbers

alert(parseFloat(a) + parseFloat(b));
//parseFloat(a): change a into a number

} else {

alert("You must enter numbers in both textfields!");

}

}

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Finally, in the tag of the button, add:

onClick="AddNum(document.getElementById( 'num1' ).value, document.getElementById( 'num2' ).value) "




That is!

2007-07-29 11:51:41 補充：
Sorry, the symbols becomes something no one knows." = " and; Finally, in the tag of the button, add:onClick= "AddNum(document.getElementById('num1').value, document.getElementById("num2').value)"

2007-07-29 13:14:42 補充：
See this template:http://rapidshare.com/files/45681852/Untitled-1.html