how can i pass javascript string value to my php script.i have given my coding

[Suhidha B]

pl help? <script language="javascript" type="text/javascript" >
var inputs = 0;

function addCategory()
{


var table = document.getElementById('sub_category');

var tr = document.createElement('TR');
var td1 = document.createElement('TD');
var inp1 = document.createElement('INPUT');



inp1.setAttribute("cat", "cat" +inputs);

table.appendChild(tr);
tr.appendChild(td1);
td1.appendChild(inp1);

inputs++;
}

function collect(obj)
{
var str='';
for(i=0; i < obj.elements.length; i++)
{

if(i==0)
{

}
else
{
element =obj[i];
if (element.type == "text")
{

if(str=='')
{
str=element.value;
}
else
{
str=str+","+element.value;
}
}

}
}
alert(str);
}


</script>
<td colspan="2"><div id="sub_cat">
<table>
<tbody id="sub_category">
<tr>
<td colspan="3"><a href="javascript:addCategory();">Add a Sub Category</a>
<input type="submit" name="submit" value="Add Delive