using javascript slider with php array -

i'm attempting make range slider work php. have part of code can't range slider update number. can see is somewhere in onchange event. posted sections of code need attention. 1 big if else statement , javascript @ end. why did way don't know. i'm in bit of time crunch though. solution awesome.

       // view products        else { // display site links echo "<p>     <a href='./index.php'>sweetshop</a></p>";  echo "<h3>our products</h3>";  echo "<form name='form1' method='post' action=''>     <p>         <input id='slider' type='range' min='.50' max='2.00' step='.50' value='2.00' onchange='printvalue('slider','rangevalue')' />         <input style='text-align: center' id='rangevalue' type='text' size='2' />         </p>     </form>"; echo "<table align='center' border='2px solid' style='width:500px;' cellspacing='0'>"; echo "<tr>     <th style='border-bottom:1px solid #000000;'>name</th>     <th style='border-bottom:1px solid #000000;'>price</th>     <th style='border-bottom:1px solid #000000;'>category</th> </tr>";   // loop display products foreach($products $id => $product) {     echo "<tr>         <td style='border-bottom:1px solid #000000;'><a href='./index.php?view_product=$id'>" . $product['name'] . "</a></td>         <td style='border-bottom:1px solid #000000;'>$" . $product['price'] . "</td>          <td style='border-bottom:1px solid #000000;'>" . $product['category'] . "</td>      </tr>"; } echo "</table>"; }      echo $footer;  ?>  <script>   function printvalue(sliderid, textbox){     var x= document.getelementbyid(textbox);     var y= document.getelementbyid(sliderid);      x.value = y.value;   }     window.onload = function () {       printvalue('slider', 'rangevalue')    }  </script> 

not sure if counts solution, i'd take @ onchange code:

onchange='printvalue('slider','rangevalue')' 

the quotation marks inside 'onchange' attribute not escaped. i'd suggest changing to:

onchange="printvalue('slider','rangevalue')" 

not being able test code, don't know if fix problem, should move things forwards @ least!