Question

I have a hidden field

<input type="hidden" name="smname" />

Now i have a function in a js file count(); How can I assign the return value to the hidden field?

Answer 1

You could give your hidden field an unique id:

<input type="hidden" name="smname" id="smname" />

and then in javascript:

document.getElementById('smname').value = count();

where count is the function you want to invoke and which returns the value:

var count = function() {
    return 'some value';    
};