// JavaScript Document
///////////////////////////////////////////////////////////////////
// this code adds the text in the field and removes on focus
///////////////////////////////////////////////////////////////////
function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = "";
thefield.style.color = "black";
}

///////////////////////////////////////////////////////////////////
// this code controls the related databases
///////////////////////////////////////////////////////////////////

function AjaxFunction(cat_id)
{
var httpxml;
try
  {
  // Firefox, Opera 8.0+, Safari
  httpxml=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
		  try
   			 		{
   				 httpxml=new ActiveXObject("Msxml2.XMLHTTP");
    				}
  			catch (e)
    				{
    			try
      		{
      		httpxml=new ActiveXObject("Microsoft.XMLHTTP");
     		 }
    			catch (e)
      		{
      		alert("Your browser does not support AJAX!");
      		return false;
      		}
    		}
  }
function stateck() 
    {
    if(httpxml.readyState==4)
      {

var myarray=eval(httpxml.responseText);
// Before adding new we must remove previously loaded elements
for(j=document.testform.subcat.options.length-1;j>=0;j--)
{
document.testform.subcat.remove(j);
}


for (i=0;i<myarray.length;i++)
{
var optn = document.createElement("OPTION");
optn.text = myarray[i];
optn.value = myarray[i];
document.testform.subcat.options.add(optn);

} 
      }
    }
	var url="rel_dd.php";
url=url+"?cat_id="+cat_id;
url=url+"&sid="+Math.random();
httpxml.onreadystatechange=stateck;
httpxml.open("GET",url,true);
httpxml.send(null);
  }
  
  
///////////////////////////////////////////////////////////////////
// toggle javascript
///////////////////////////////////////////////////////////////////  
  
    function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }