how can i print value of input text type id in javascript

Maybe everyone else is reading a different question than I am but it seems like you want the value of the ID, not the value of the input.

<input type=text name=input id="in1" value=1 onclick=inputs(this.id)>
<input type=text name=input id="in2" value=2 onclick=inputs(this.id)>
<input type=text name=input id="in3" value=3 onclick=inputs(this.id)>
<input type=text name=input id="in4" value=4 onclick=inputs(this.id)>
<script type=text/javascript>
function inputs(val)
{
    document.write(val);
}
</script>

This will give you the ID of that element, not its value. Which is what I hope I'm reading from this oddly worded question.

<input type=text name=input id="in1" value=1 onclick=inputs(this.id)>
<input type=text name=input id="in2" value=2 onclick=inputs(this.id)>
<input type=text name=input id="in3" value=3 onclick=inputs(this.id)>
<input type=text name=input id="in4" value=4 onclick=inputs(this.id)>
<script type=text/javascript>
function inputs(id)
{
var val=id;
document.write(val);
}
</script>

<input type=text name=input id="in1" value=1 onclick=inputs(this)>
<input type=text name=input id="in2" value=2 onclick=inputs(this)>
<input type=text name=input id="in3" value=3 onclick=inputs(this)>
<input type=text name=input id="in4" value=4 onclick=inputs(this)>
<script type=text/javascript>
function inputs(dis)
{
var val=dis.value;
document.write(val);
}
</script>

Can you try this, Added this in inputs(this)

HTML:

<input type=text name=input id="in1" value=1 onclick=inputs(this)>

Javascript:

<script type=text/javascript>
function inputs(d)
{   
   document.write(d.value);
}
</script>

Try

onclick=inputs(this)

And

function inputs(element)
{
   var val = element.id;
   // rest of the code here
}

Try this

<input type="text" name="input" id="in1" value="1" onclick="inputs(this.id)">
<input type=text name=input id="in2" value=2 onclick="inputs(this.id)">
<input type=text name=input id="in3" value=3 onclick="inputs(this.id)">
<input type=text name=input id="in4" value=4 onclick="inputs(this.id)">
<script type=text/javascript>
function inputs(id)
{
var val=id
alert(val);
}
</script>

DEMO

Most easiest way

<input type="text" name="input" id="in1" value="1" onfocus="inputs(this.value)">
<script type=text/javascript>
function inputs(x)
{
document.write(x);
}
</script>

<input type="text" name="input" id="in1" value="1" onclick="inputs(this)">
<input type="text" name="input" id="in2" value="2" onclick="inputs(this)">
<input type="text" name="input" id="in3" value="3" onclick="inputs(this)">
<input type="text" name="input" id="in4" value="4" onclick="inputs(this)">
<script type=text/javascript>
function inputs(elem)
{
var val=elem.id;
console.log(val);
}
</script>

Check value in console

Try this

<input type=text name=input id="in1" value=1 onclick=inputs(this)>
<input type=text name=input id="in2" value=2 onclick=inputs(this)>
<input type=text name=input id="in3" value=3 onclick=inputs(this)>
<input type=text name=input id="in4" value=4 onclick=inputs(this)>
<script type=text/javascript>
function inputs(el)
{
 var val=el.getAttribute('id');
 document.write(val);
}
</script>

It will get id of clicked input field.Try this:
DEMO : http://jsfiddle.net/6Z2fR/

<input type=text name=input id="in1" value=1 onclick=inputs(this)>
<input type=text name=input id="in2" value=2 onclick=inputs(this)>
<input type=text name=input id="in3" value=3 onclick=inputs(this)>
<input type=text name=input id="in4" value=4 onclick=inputs(this)>

  <script type=text/javascript>
        function inputs(e)
        {
            var val=e.id;
            console.log(val);
        }
    </script>

I think it is better to use jQuery, you can change event like mouseover/keydown/hover and make code not too mess :P

<input type="text" name="input" id="in1">
<input type="text" name="input" id="in2">
<input type="text" name="input" id="in3">
<input type="text" name="input" id="in4">

<script type="text/javascript">
(function ($) {
    $('input[type="text"]').each(function () {
        $(this).click(function () {
            alert($(this).attr('id'));
        });
    });
})(jQuery);

Or just see the demo in JSFiddle, click me!

Try This:

<input type="text" name="input" id="in1" value="1" onclick="inputs(this)">
<input type="text" name="input" id="in2" value="2" onclick="inputs(this)">
<input type="text" name="input" id="in3" value="3" onclick="inputs(this)">
<input type="text" name="input" id="in4" value="4" onclick="inputs(this)">

function inputs(element) {
    var id = element.id;
    var val = element.name;
    alert(val ,id);
}

fiddle Demo