function createObject()
{
  if(window.XMLHttpRequest)
  {
    var obj    = new XMLHttpRequest();
  }
  else
  {
    var obj    = new ActiveXObject('Microsoft.XMLHTTP');
  }
 return obj;
}
var httpobj    =    createObject();

function get_price(attribute_id, num)
{
    if(attribute_id=='')
    {
        return false;
    }
    
    var redirect = "ajax_atri_price.php?attribute_id="+attribute_id;

    var element=document.getElementById('frm');
    
    if(element!=null)
    {
        element.action="product1.php?product_id="+attribute_id;
    }
    
    httpobj.open('get',redirect);
    httpobj.onreadystatechange=function()
    {
       if(httpobj.readyState==4)
       {
            var text=httpobj.responseText;
                       
            document.getElementById('price_span'+num).innerHTML = text;           
       }    
    };
    httpobj.send(null);    
}

function submit_form(id)
{
    var element=document.getElementById(id);     
    
    if(element!=null)
    {
        if(element.value=='')
        {
            alert("Please Select an "+element.title);
            return false;
        }
        else
        {
            document.getElementById('frm').action="product1.php?product_id="+element.value;
        }
    }
    document.getElementById('frm').submit();
}

function go_to_cart(id)
{
    var element=document.getElementById(id);     
    
    if(element!=null)
    {
        if(element.value=='')
        {
            alert("Please Select an "+element.title);
            return false;
        }
        else
        {
            window.location.href='shopping_cart.php?add_to_cart=1&attribute_id='+element.value;            
        }
    }
}