// open_window javascript
	w_openwindow = null;
	function open_window(nurl,windowname,width,height, leftPos, topPos, scrollbars, resizable, newwindow)
	{
		if (typeof leftPos == 'undefined' || leftPos < 0) leftPos = (self.screen.width-width-25)/2;
		if (typeof topPos == 'undefined' || topPos < 0) topPos = (self.screen.height-height-25)/2;	
		if (typeof newwindow == 'undefined') newwindow = 0;
		scrollbars = typeof scrollbars == 'undefined' ? 'yes' : 'no';
		resizable = typeof resizable == 'undefined' ? 'yes' : 'no';
		if (newwindow)
		 	window.open(nurl, windowname,'width='+width+',height='+height+',left='+leftPos+',top='+topPos+',directories=no,location=no,menubar=no,scrollbars='+scrollbars+',status=yes,toolbar=no,resizable='+resizable);
		else
			w_openwindow = window.open(nurl, windowname,'width='+width+',height='+height+',left='+leftPos+',top='+topPos+',directories=no,location=no,menubar=no,scrollbars='+scrollbars+',status=yes,toolbar=no,resizable='+resizable);
	}

	
	function showLayer(infoLayerId, state, strength) {
	grayOut(state, {'opacity':strength});
	if (state == true) {
		document.getElementById(infoLayerId).style.zIndex = 100000;
		document.getElementById(infoLayerId).style.visibility = 'visible';
		
	}
	else {
		document.getElementById(infoLayerId).style.zIndex = -100000;
		document.getElementById(infoLayerId).style.visibility = 'hidden';
	}
}

function grayOut(vis, options) {
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout 
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {}; 
  var zindex = options.zindex || 50;
  var opacity = options.opacity || 70;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height 
    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
        var pageWidth = document.body.scrollWidth+'px';
        var pageHeight = document.body.scrollHeight+'px';
    } else if( document.body.offsetWidth ) {
      var pageWidth = document.body.offsetWidth+'px';
      var pageHeight = document.body.offsetHeight+'px';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }   
	//alert(pageHeight);
	var pageHeight='100%';
	var pageWidth='100%'
    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;                      
    dark.style.MozOpacity=opaque;                   
    dark.style.filter='alpha(opacity='+opacity+')'; 
    dark.style.zIndex=zindex;        
    dark.style.backgroundColor=bgcolor;  
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';                          
  } else {
     dark.style.display='none';
  }
}