How to add dynamic textbox (row) and save to database using PHP

Hi. I have here my Javascript code that adds dynamic textbox (row) my problem is how can I save this to database using PHP script? How you can help me guys… Thanks!

<script type=“text/JavaScript”>
function addRow(r){
var root = r.parentNode;//the root
var allRows = root.getElementsByTagName(‘tr’);//the rows’ collection
var cRow = allRows[0].cloneNode(true)//the clone of the 1st row
var cInp = cRow.getElementsByTagName(‘input’);//the inputs’ collection of the 1st row
for(var i=0;i<cInp.length;i++){//changes the inputs’ names (indexes the names)
cInp[i].setAttribute(‘name’,cInp[i].getAttribute(‘name’)+‘_’+(allRows.length+1))
}
root.appendChild(cRow);
}
function shownames(){
var allInp=document.getElementsByTagName(‘input’);
for(var i=0;i<allInp.length;i++){
alert(allInp[i].name)
}
}
</script>

My HTML code:

<form method= POST> <table width=“1024” border=“0” cellspacing=“6” cellpadding=“0”> <tr> <td width=“195”><div class=“user”><input type=“text” name=“textfield_a” id=“user” tabindex=“6”/></div></td> <td width=“410”><div class=“reported”><input type=“text” name=“textfield_b” id=“reported” tabindex=“7”/></div></td> <td width=“399”><div class=“reported”><input type=“text” name=“textfield_c” id=“reported” tabindex=“8”/></div></td> <td width=“10”><input name=“button” type=“button” value=“+” onclick=“addRow(this.parentNode.parentNode)”></td> </tr> </table> </form>

Take a look at http://pastie.org/930017, http://pastie.org/930023, and this post http://www.michaelpeacock.co.uk/blog/entry/add-another-item-with-php-and-jquery.