/*
	Image functions encapsulated here:
	1. pre-load images
	2. swap image
	3. swap image restore
	4. set window status
*/

function preloadImages() {
  if (document.images) {
    var imgFiles = preloadImages.arguments;
    var preloadArray = new Array();
    for (var i=0; i<imgFiles.length; i++) {
      preloadArray[i] = new Image;
      preloadArray[i].src = imgFiles[i];
    }
  }
}

function swapImage() {
  var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.swapImgData;
  for (i=0; i < (swapImage.arguments.length-2); i+=3) {
    objStr = swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
    if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
        (objStr.indexOf('document.all[')   ==0 && document.all   ==null))
      objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
    obj = eval(objStr);
    if (obj != null) {
      swapArray[j++] = obj;
      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
      obj.src = swapImage.arguments[i+2];
  } }
  document.swapImgData = swapArray; //used for restore
}

function swapImgRestore() {
  if (document.swapImgData != null)
    for (var i=0; i<(document.swapImgData.length-1); i+=2)
      document.swapImgData[i].src = document.swapImgData[i+1];
}

function displayStatusMsg(msgStr) {
  switch(msgStr) {
  	case 'ext':		// external link
		msgStr='another window will open with this link';
		break;

	case 'pat':		// link to PATTERNS main from subsection
		msgStr='return to PATTERNS main page';
		break;

	case 'dis':		// link to DISCORD main from subsection
		msgStr='return to DISCORD main page';
		break;
		
	case 'neo':		// link to NEODATUM main from subsection
		msgStr='return to NEODATUM main page';
		break;
		
	case 'nex':		// link to NEXUS main from subsection
		msgStr='return to NEXUS main page';
		break;
		
	case 'res':		// link to RESONANCE main from subsection
		msgStr='return to RESONANCE main page';
		break;
		
	case 'sym':		//link to SYMBIOSIS main from subsection
		msgStr='return to SYMBIOSIS main page';
		break;
		
	case 'tur':		//link to TURBULENCE main from subsection
		msgStr='return to TURBULENCE main page';
		break;
		
	case 'cor':		//link to CORE page from subsection
		msgStr='return to the CORE of chaos';
		break;
		
	case 'ran':		//RANDOM link
		msgStr='bored? take a RANDOM ride';
		break;
		
	default:		// either " " from onMouseOut or custom message
		msgStr=msgStr; 
		break;
	}
  window.status=msgStr;
  document.returnValue = true;
}