var pageName;
var images;

function initPage(page)
{
    pageName = page;

    // Pre-load (tab) images

    var list = new Array ("home","symptoms","search","tips",
	    	          "references","safety","car","shop");

    images   = new MakeImages (list);
}

function MakeImages(names) {
    var name;

    this.length = names.length;

    for (var count=0; count < names.length; count++) {
	name = names[count];

	this[name]     = new Image();
        this[name].src = "/images/text/" + name + ".gif";
    }

    return this;
}

function getDocument()
{
    if (navigator.appName == "Microsoft Internet Explorer")
	theDoc = document.all;
    else
        theDoc = document;

    return theDoc;
}

function switchImages(action,name)
{
    if (name == pageName)
        return;

    var theDoc, image;

    theDoc = getDocument();
    image  = name + ".gif";

    if (action == 'on') {
        theDoc[name].src = "/images/on/" + image;
//        theDoc.text.src  = images[name].src;
    } else {
        theDoc[name].src = "/images/off/" + image;
//        theDoc.text.src  = images[pageName].src;
    }

    return true;
}

function toggleImage()
{
    var theDoc = getDocument();

    theDoc[pageName].src = "/images/on/" + pageName + ".gif";
}

function SelectAllCheckBox(form)
{
   for (var i = 0; i < form.elements.length; i++)
   {
      var temp = form.elements[i];
      if ( (temp.name != 'selectall') && (temp.type == 'checkbox') )
      {
            temp.checked = form.selectall.checked;
      }
   }
}