Edit in JSFiddle

$(document).ready(function() {
    $("#btnSubmit").click(function(e) {
        var txtData = [];
        $("form :input[type=text]").each(function() {
            txtData.push($(this).val());
        });
        $("#hdnData").val(txtData.join("$$$"));
        $('p').html($("#hdnData").val());
        e.preventDefault();
    });
});

<form>
Blog Name: <input type='text' id='txtName' value="jQuery By Example" />
<br/>
<br/>
Description :<input type='text' id='txtDesc'  value="It's Rocking" />
<br/><br/>
Technology :<input type='text' id='txtTech'  value="jQuery" />
<br/><br/>
<input type='hidden' id='hdnData' />
<input type='button' id='btnSubmit' value='Submit' />
    <p></p>
</form>