/*************************************************************************
  This code is from Dynamic Web Coding at www.dyn-web.com
  Copyright 2002-4 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

// change speed of slide here
var slide_in_speed = 750;	// millisecond duration of slide into view
var slide_out_speed = 600;  // millisecond duration of slide out of view

function initGlideLayers() {
  var glideLyrs = new Array();
  
  // Set up your layers here
  // arguments: id, left=0 (offset calculated based on width), top
  toppos = document.getElementById("topicstop").offsetTop + 2; 
  glideLyrs[0] = new dynObj('glideDiv0', 0, toppos);
  glideLyrs[1] = new dynObj('glideDiv1', 0, toppos);
  glideLyrs[2] = new dynObj('glideDiv2', 0, toppos);
  glideLyrs[3] = new dynObj('glideDiv3', 0, toppos);
  
  for (var i=0; glideLyrs[i]; i++) {
		// hold original left position 
		glideLyrs[i].xOff = -(glideLyrs[i].w + 10);
		glideLyrs[i].shiftTo( glideLyrs[i].xOff, glideLyrs[i].y );
		glideLyrs[i].show();
  }
  //slideEm('glideDiv0'); // Slide first one into view 
}

var curGlideLyr;
function slideEm(id) {
    var oldLyr, newLyr;
    // if link for current layer clicked, slide it out of view 
    if (curGlideLyr == id) { 
        oldLyr = dynObj.getInstance(curGlideLyr);
        oldLyr.slideTo(oldLyr.xOff, null, slide_out_speed, -1);
        curGlideLyr = ""; return; 
    }
    // if layer currently in view, set up to slide new one into view
    // after current one slides away
    if (curGlideLyr) {
        oldLyr = dynObj.getInstance(curGlideLyr);
        oldLyr.onSlideEnd = function() { 
            dynObj.holder[curGlideLyr].slideTo(10, null, slide_in_speed, -1); 
            this.onSlideEnd = function() { if (this.el) this.el = null } 
        }
        // slide current layer out of view
        oldLyr.slideTo(oldLyr.xOff, null, slide_out_speed, -1);
    } else { 	// if no layer currently in view
        newLyr = dynObj.getInstance(id);
        newLyr.slideTo(10, null, slide_in_speed, -1);
    }
    curGlideLyr = id;
}