Current Events > Any programmer know how to do this with Javascript? Need some idea

(+) Yeah! (+)

Create a function using JavaScript that calculates the area of a triangle.
*b*h
Validate that the Width and Height are both numbers.
Validate that both he Width and Height are both greater than 0
Validate that neither the Width is more than 2X the Height or the Height is more than 2X the Width.
The function should be called from the onclick event of the Calculate Area button
The result should be stored in the text box at the bottom of the form and the result should be displayed in bold.

Allow the user to enter 5 whole numbers.
Validate that they are all entered and are numbers.

Basically how to connect to other.
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You can get the contents of the input boxes in a variety of ways. I would just google it. IIRC, you can do document.getElementById(/*id*/).innerHTML.

To verify type, you should use isNaN(parseFloat()).

The rest is pretty simple boolean checks.

Oh, except the onclick part. Just add onclick= as an attribute to your button.

<button id="whatever" onclick=myfunc>Calculate Area</button>
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Why do you need five numbers to calculate a triangle?

(shuffle
.:cards:.
If black then "fart"
) end
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Questionmarktarius posted...

Why do you need five numbers to calculate a triangle?

The next thing is getting the maximum and minimum number
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Why this?

Validate that neither the Width is more than 2X the Height or the Height is more than 2X the Width.

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Do I do this? var area = .5 * width * height?
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That should work. Try it and see. Get the form to display first then you can gradually add to it and check it works at each stage.

function calculateArea( width, height ) {
var area = .5 * width * height;
return area;

document.getElementById( "calc" ).onclick = function(){
console.log( calculateArea(document.getElementById("width").value, document.getElementById("height").value);
}

How about this?
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