how to display message if none of the checkbox is selected

[mukeshrasm]

of course you can, but the disadvantage is that you have to compute the array length every time anew, while the first one computes the length only once.

and another one: use count_var < array_length (as terminating condition), otherwise you'll access a non-existing element, which may cause your script to break

Hi

Reference to post #7 I want to find the number of checkboxes in the form. I gave id to checkbox "checkdel" and to that I used like this

var ch=document.getElementById("checkdel")
var chh=ch.length
alert(chh)

but it is showing as 'undefined'.

[Dormilich]

of course. a HTMLInputElemen t (and its parent interface HTMLElement) does not have a length property (why should it, you know that there is only one).

[mukeshrasm]

of course. a HTMLElementNode does not have a length property (why should it, you know that there is only one).

actually I am doing it dynamically using php

[Dormilich]

I guess you'll have to check it in PHP anyways.....

[mukeshrasm]

I guess you'll have to check it in PHP anyways.....

ok thanks! but I am not sure what will be title of my posting or how can I reference my this posting to php

[Dormilich]

you can always put a link to this thread in your question.

although I don't understand why you've given up on this little script. you've nearly had it finished...

advice for PHP : if you name your checkboxes like name="checkbox_ name[]" all the checkboxes bearing this will be put into an array.

some further reading on HTML DOM object types:HTML IDL Definitions (these tell you, which methods and properties are available from the DOM side)

[mukeshrasm]

you can always put a link to this thread in your question.

although I don't understand why you've given up on this little script. you've nearly had it finished...

advice for PHP : if you name your checkboxes like name="checkbox_ name[]" all the checkboxes bearing this will be put into an array.

some further reading on HTML DOM object types:HTML IDL Definitions (these tell you, which methods and properties are available from the DOM side)

Thanks for encouraging words and I am trying.