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 || 500;
  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 windowSize(strDimension) {
var strWindowSize = 0;

if(strDimension=='w'){
	if( typeof( window.innerWidth ) == 'number' ) {
		strWindowSize = window.innerWidth;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		strWindowSize = document.documentElement.clientWidth;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		strWindowSize = document.body.clientWidth;
	}
};

if(strDimension=='h'){
	if( typeof( window.innerWidth ) == 'number' ) {
		strWindowSize = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		strWindowSize = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		strWindowSize = document.body.clientHeight;
	}
};

return strWindowSize;
}




function getScroll(strScroll){
var strScrollPos = 0;

if(strScroll=='x'){
	if( typeof( window.pageYOffset ) == 'number' ) {
	//Netscape compliant
		strScrollPos = window.pageXOffset;
	} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
	//DOM compliant
		strScrollPos = document.body.scrollLeft;
	} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
	//IE6 standards compliant mode
		strScrollPos = document.documentElement.scrollLeft;
	}
};

if(strScroll=='y'){
	if( typeof( window.pageYOffset ) == 'number' ) {
	//Netscape compliant
		strScrollPos = window.pageYOffset;
	} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
	//DOM compliant
		strScrollPos = document.body.scrollTop;
	} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
	//IE6 standards compliant mode
		strScrollPos = document.documentElement.scrollTop;
	}
};

return strScrollPos;
}

window.onscroll = scrollDetected;

function scrollDetected(){
if(document.getElementById('div.popup')!=null){
if(document.getElementById('div.popup').style.display==''){
elmDivHeight = document.getElementById('div.popup').style.height;
elmDivHeight = parseInt(elmDivHeight.replace(/px/,''));

strHeightPos = Math.round((windowSize('h') - elmDivHeight) / 2);

document.getElementById('div.popup').style.top = getScroll('y')+strHeightPos+'px'; 

};
};
};

function showPopup(strHeader,strContent,strShow,strWidth,strHeight){
if(strShow==1){

grayOut(true);

strWidthPos = Math.round((windowSize('w') - strWidth) / 2);

strHeightPos = Math.round((windowSize('h') - strHeight) / 2);

if(document.getElementById('div.popup') != null){
var elmDiv = document.getElementById('div.popup');
}else{
var elmDiv = document.createElement('div');
};
elmDiv.id = 'div.popup'
elmDiv.style.width =  strWidth + 'px'; 
elmDiv.style.height = strHeight + 'px'; 
elmDiv.style.left = strWidthPos+'px'; 
elmDiv.style.top = getScroll('y')+strHeightPos+'px'; 
elmDiv.style.position = 'absolute';
elmDiv.style.zIndex = 550;
elmDiv.className = 'adm_popup';

elmDiv.innerHTML = '<div class="adm_popup_header">' + strHeader + '</div><div style="position:absolute;left:' + (strWidth-25) + 'px;top:5px;"><img src="./images/close.png" align="center" alt="" style="cursor:pointer;" onclick="showPopup(\'\',\'\',0,0,0);" /></div>';
elmDiv.innerHTML += '';
elmDiv.innerHTML += '<div class="adm_popup_content" id="div.popup.content" style="position:relative;max-height:' + (strHeight-40) + 'px;">' + strContent + '</div>'; 

if(document.getElementById('div.popup') != null){
document.getElementById('div.popup').style.display = '';
}else{
document.body.appendChild(elmDiv);
};
};

if(strShow==0){

grayOut(false);

document.getElementById('div.popup').style.display = 'none';
document.getElementById('div.popup').innerHTML = '';


};
};