Set HTML textbox value from Javascript function return value

Question

I've two separate HTML file and .js file. I have a calculate method which return the result in the Javascript file.

My question is how to set a textbox value from a Javascript return value. Or at least from a separate Javascript file. Initially I tried below which doesn't work as Javascript and html are separated.

function Calculate(ch) 
{
    //...
    document.getElementById('Input').value = resultValue;
}

Try using an alert box with your method in it. Also setting up a simple example on a site like jsfiddle helps us out a lot. — Timothy Ruhle
– Timothy Ruhle, Commented Mar 18, 2011 at 12:19

CharithJ · Accepted Answer · 2011-03-19 02:02:40Z

1

eval is the soution for my problem. Input.value = eval(Calculate(ch))

answered Mar 19, 2011 at 2:02

CharithJ

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Comments

Felix Dransfeld · Accepted Answer · 2011-03-18 12:16:11Z

0

try to define the js-file in the bottom of your html-file (near the </body>). if you defined it above the targeted element its unknown. this may help.

felix

answered Mar 18, 2011 at 12:16

Felix Dransfeld

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1 Comment

CharithJ Over a year ago

I tried but not working. If I call normal javascript function that's working. So javascript file is properly definied I think but this perticular functionality.

ithcy · Accepted Answer · 2011-03-18 13:51:30Z

0

Access textarea contents using the innerHTML property, not the value property.

function Calculate(ch)  {
    //...
    document.getElementById('Input').innerHTML = resultValue;
}

answered Mar 18, 2011 at 13:51

ithcy

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2 Comments

CharithJ Over a year ago

I tried but not working. My "Input" text box is in a table inside a form. Is that an issue?

ithcy Over a year ago

Is it an <input> or a <textarea>?

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