How to fire a JS event when "Enter" key is pressed ?

[pankajit09]

Hi,

I want to invoke a JS function when "Enter" key is pressed ?

Using the onkeydown event will be a way but how to track the "Enter" key ?

[dmjpro]

u better to use onkeypress on onkeyup.....
onkeydown will work also....
function checkEnter()
{
if(event)
{
if(evnet.keyCode == 13) //ur code
}
else if(evt)
{
if(evt.keyCode == 13) //ur code
}
}

[acoder]

Hi,

I want to invoke a JS function when "Enter" key is pressed ?

Using the onkeydown event will be a way but how to track the "Enter" key ?

See this page. The code for the enter key is 13 (as dmjpro pointed out).

[acoder]

u better to use onkeypress on onkeyup.....
onkeydown will work also....
function checkEnter()
{
if(event)
{
if(evnet.keyCode == 13) //ur code
}
else if(evt)
{
if(evt.keyCode == 13) //ur code
}
}

onkeyup is fine. Also, for Firefox and other non-IE browsers, you should use the event argument for the function,e.g.

function checkEnter(event)
{
   if (event.keyCode == 13) //ur code
}

[pankajit09]

What is the problem with onkeydown ?

[pankajit09]

Also please tell me whether the following code is correct -->

function checkEnter(e){ 
        var characterCode
        if(e && e.which){ 
            e = e
            characterCode = e.which 
        } else {
            e = event
            characterCode = e.keyCode
        }
        if(characterCode == 13){ 
            getSearchResults(); 
        }
    }
 

[dmjpro]

ur code is fine -- for cross browser check

kewdown is .... when a key just gets down then the event fires ...
if the user continues press the enter key without releasing then the event will fire many times with in a second....
that's why it is not suitable ...

if u want only once the event will fire even user continues press it ..
then try this code ..

function fun_name(e)
{
if(charactercode == 13)
{
//disable that control so that it is no more to take enter key
//ur code
}
}

try do one more thing while u writing js code ...
it is not mandatory to put ; after each line ...
but it is a bad practice ...
good practice to put ; after each line

welcome in advance

[pankajit09]

Thanks a lot !!

[pankajit09]

Is e=e required in the above code ?

[acoder]

Use this code in your function:

var code;
if (!e) var e = window.event;
if (e.keyCode) code = e.keyCode;
else if (e.which) code = e.which;

Then code will contain the key pressed.

[vindesh]

Use this code:-

<script language="javascript">
function keypress(e)
{
    var Ucode=e.keyCode? e.keyCode : e.charCode
    if (Ucode == 13)
    {
        //write the code for submit
        AddChat(page);
    }
}
</script> 
 

***************************************
add this event on text box onkeypress="keypress(event);"

Regards
Vindesh Mohariya(Lowanshi)

[acoder]

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