function nav_hover (id,section,state) {
	id.src="/images/nav/nav_" + section + state + ".jpg";
}
			
			
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%';
	    }   
	    //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';
	  }
}



function show_login() {
		grayOut(true,{'opacity':'80', 'bgcolor':'#ccc', 'zindex':'25' });
	
		var email = window.prompt('Please enter your login info. \nMichael - ask me about this.');
		
		grayOut(false);
}


function show_lost_password() {
		grayOut(true,{'opacity':'80', 'bgcolor':'#ccc', 'zindex':'25' });
	
		var email = window.prompt('Please enter your email.');
		
		grayOut(false);
}


function icon_text(section,id,ww) {
	document.getElementById(section + '_icon_text_' + id).innerHTML  = ww ;

}

function set_background (id,c) {
	id.style.backgroundColor = c;

}