/* Tom Sawyer common script functions */

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

//
// This method is called from the map when the mouse is moved over
// the name in the image.   If you want it to only switch when the
// user clicks on the name, change the onMouseOver in the <area>
// tags to onClick
//
function swapImage(name)
{
   document.maingraph.src=name;
}

//
// This method is called when the mouse moves outside of the image
// to restore the animated gif
//
// Note the onMouseOut line in the <img> block.
//
function restoreImage()
{
   document.maingraph.src="images/graph_circular.gif";
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function enable_stateprovince(country)
{
    if (country != null)
    {
        if (document.getElementById("state") != null &&
            document.getElementById("province") != null)
        {
            if (country.value == "USA")
            {
                if (document.getElementById("state").selectedIndex == 1)
                {
                    document.getElementById("state").selectedIndex = 0;
                }

                document.getElementById("state").disabled = false;
                document.getElementById("province").disabled = true;
                document.getElementById("province").value = "";
            }
            else
            {
                document.getElementById("state").disabled = true;
                document.getElementById("province").disabled = false;
                document.getElementById("state").selectedIndex = 1;
            }
        }
    }
}

function enable_other(source_id, target_id)
{
    var source = document.getElementById(source_id);
    var target = document.getElementById(target_id);
    var notother = true;

    if (source && target)
    {
        if (source.options[source.selectedIndex])
        {
            if (source.options[source.selectedIndex].text == "Other")
            {
                notother = false;
            }
        }

        target.disabled = notother;

        if (notother)
        {
            target.value = "";
        }
    }
    else
    {
        alert("one not found");
    }
}