submitting only a particulat field whene there are many fiels in a form

[bindiya]

I have a webpage in php which contains many fiields.But when i enter data into one particular field(say the first field),i need the form to get submitted and do certain task.How can i achieve this?

[solon]

So you want the complete form to be submited even with empty fields automatically as a user writes in the field or when he changes a field?

 

Either way you need to use javascript to manipulate the data on the client side. 

document.yourform.submit()

or if you want to do server side functions use ajax to send it to php file where you will handle the form data.

 

Now to actually do the abaove you need to call a function either:

onkeyup='your_javascript_function()' or onblur='your_javascript_function()'

This would have to be like:

<input type='text' name='your_field' id='your_field' onblur='your_javascript_function()' />

or

<input type='text' name='your_field' id='your_field' onkeyup='your_javascript_function()' />

 

I hope this helps

[bindiya]

the problem is in my form i have only one submit button.But before clicking that submmit button i nned a textfield to be submitted when the mouse goes to the second textfield,

[solon]

Then on the first text field use the onblur like :

<input type='text' name='your_field' id='your_field' onblur='your_javascript_function(this.value)' />

were you see your_javascript_function(this.value) it's the function that will handle the data from that form

 

[bindiya]

do i need to code this way

 

<form name='usercheck' method="post" action='useravailability.php'> <input name="username" type="text" id="username" value="" maxlength="15"  onblur='submit(this.value);'/></td><td width="185"></form>

[solon]

well submit() is a reserved javascript function so its better to use another name for your function. like chk() for check. But yes that is the general idea. Also you need to have a function like

<script type="text/javascript">
function chk(username)
{
//do something here
}
</script>

in order to get the value and handle it the way you want within the function