//change image on click

function display(index)

{

   // alert("display");

    //alert("index"+index);

     var image_id =arrCmp[index][2]+'_image';

    /*document.images[index].src=pic;*/

    document.getElementById(image_id).src=arrCmp[index][3];

    width='100px';

    document.getElementById(image_id).style.width=width;



}



// Calculate the total for items in the form which are selected.

function calculateTotal(index,margin) {



//alert("calculateTotal");

//alert("index"+index);

      //new total

      var calculatedtotal=0;

      //price selected

      var price = arrCmp[index][0];



           // get previous price in category

      var prevselectbutt = previouslySelectedRadioButton_array[arrCmp[index][2]];



      // Subtract the previously selected radio button value from the total.

      calculatedtotal = eval(currenttotal - prevselectbutt);





      // Save the current radio selection value.

      prevselectbutt = arrCmp[index][0];

      previouslySelectedRadioButton_array[arrCmp[index][2]] = prevselectbutt;



      // Add the current radio button selection value to the total.



      var new_total = eval(calculatedtotal) + eval(arrCmp[index][0]);



      //new_total = formatCurrency(new_total);





        currenttotal = new_total;

     





      document.getElementById('calculatedTotal').innerHTML = "£"+new_total.toFixed(2);



    // Return total value.

    //return(formatCurrency(calculatedTotal.value));

   // return(formatCurrency(calculatedtotal));



}



//update the spec on the right hand-side

function update_spec(index,type)

{

   // var arrCmp = new Array()

//arrCmp[0] = new Array("d_81473","586012","0.00","I do not need an operating system pre-installed (without OS)","586012");

    var name = arrCmp[index][1];

    var category = arrCmp[index][2];

    var category_name = type+'_type';



    document.getElementById(type).innerHTML = name;

    //document.getElementById(category_name).innerHTML = category;

    //document.getElementById(category_name).setAttribute("class", "spec_category_title");



}