// JavaScript Document


function AlphaScreen(vis,options,alphaHeight) {
  // 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 || 150;
  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 ) ) 
	{
		//alert("scroll");
        var pageWidth = document.body.scrollWidth+'px';
        var pageHeight = document.body.scrollHeight+'px';
    } 
	else if( document.body.offsetWidth ) 
	{
		//alert("offset");
      	var pageWidth = document.body.offsetWidth+'px';
      	var pageHeight = document.body.offsetHeight+'px';
    }
	else 
	{
		//alert("100%");
       	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=alphaHeight;//pageHeight;//TM change to alphaHeight
    dark.style.display='block';                          
  } 
  else 
  {
     dark.style.display='none';
  }
}







////////////////////////////////////////////////////////////////////////////////
/////////////////////// ALPHA SCREEN ON / OFF FUNCTIONS ///////////////////////
//////////////////////////////////////////////////////////////////////////////


//SCREEN ON
function AlphaScreenOn(){

	Set_Cookie('alphaScreen',"on");
	
	//alphaHeight = "895px";
	alphaHeight = Get_DocHeight()+"px";
	AlphaScreen(true,{'bgcolor':'#000000','opacity':'85'},alphaHeight); 

	Center_Div(400,200,'msg-box');//div width, div height, div id name
	var msgBox = document.getElementById("msg-box");
	msgBox.style.display = "inline";

	theMsg ='PROCESSING...';

	var txtElem = document.getElementById('txt-area');
	txtElem.value= theMsg;	
		
		
}//END 


//SCREEN OFF
function AlphaScreenOff(){

	//alert("ScreenOff");

	var msgBox = document.getElementById("msg-box");
	msgBox.style.display = "none";

	Set_Cookie('alphaScreen',"off");
	AlphaScreen(false); 
	
}//END