this.ie4 = (document.all && !document.getElementById) ? true : false;
this.ie = (document.all && document.getElementById) ? true: false;
this.ne4 = (document.layers) ? true : false;
this.ne6 = (document.getElementById && !document.all) ? true : false;

var modifiedStatus = false;
var modifiedMessage = 'You may have changed page content without saving. \nClick OK to continue without saving (any changes will be lost), \nor cancel to go back and click save.';
  
// image rollover function
/*
<a href="" onclick="openMenu(true);return false;"  onMouseout="swapLayerImage('HeaderLayerClosed', 'menuClose','Off');self.status='';return true;" onMouseOver="swapLayerImage('HeaderLayerClosed', 'menuClose','On');self.status='admin_performance';return true;" > */

function swapLayerImage(layerID, imgName, onOff) {
    if(document.images) {
        var layerDocObj=getLayerDocument(layerID);
		    layerDocObj.images[imgName].src=eval(imgName+onOff+'.src');
    }
}

function chgImg(imgNam, onoff, change){
	if(document.images && change!='on'){	
    document.images[imgNam].src=eval(imgNam+onoff+'.src');
    
	}
}

function chgImgLayer(imgNam, onoff, change, layerName){
	if(document.images && change!='on'){	
    if (!ne4) {
      document.images[imgNam].src=eval(imgNam+onoff+'.src');
    } else {
      document.layers[layerName].document.images[imgNam].src=eval(imgNam+onoff+'.src');
    }
    
	}
}

function getLayerDocument(layerID) {
	if(ne4) {
		return eval("document." + layerID + ".document")
	} else {
		return document;
	}
}

function setModifiedStatus() {
  modifiedStatus = true
}

function checkModifiedStatus() {

  if (modifiedStatus==true) {
    if (confirm(modifiedMessage)) {
      return true;
    }
    return false;
  }
  return true;
}
/*
if (document.images)	{

    expand =new Image();  expand.src="/srs/images/expand.gif";
    collapse =new Image();  collapse.src="/srs/images/contract.gif";

}
*/
function openMenu(onVal) {
	var closeVal;
	if(onVal) {
		closedVal='hidden';
		openVal='visible';
		openZ=1
		closedZ=0
	} else {
		closedVal='visible';
		openVal='hidden';
		openZ=0
		closedZ=1
	}
	if (ne4) {	
		document.HeaderLayerOpen.zIndex=openZ;
		document.HeaderLayerClosed.zIndex=closedZ;		
		
//		document.HeaderLayerOpen.visibility=onVal;
//		document.HeaderLayerClosed.visibility=!(onVal);
	} else if(ne6) {
		document.getElementById('HeaderLayerOpen').style.zIndex=openZ;
		document.getElementById('HeaderLayerClosed').style.zIndex=closedZ;

//		document.getElementById('HeaderLayerOpen').style.visibility=openVal;
//		document.getElementById('HeaderLayerClosed').style.visibility=closedVal;
				
	} else {
		document.all('HeaderLayerOpen').style.zIndex=openZ;
		document.all('HeaderLayerClosed').style.zIndex=closedZ;
		
//		document.all('HeaderLayerOpen').style.visibility=openVal;
//		document.all('HeaderLayerClosed').style.visibility=closedVal;			
	
	}
	
}

var popF;
function centeredPopup(page, popWidth, popHeight, close_only) {
	
	if ( popF && !popF.closed && popF.close ) {
		popF.close();
	}
	if ( !close_only ) {
		if (popWidth==null) { popWidth=400 }
		if (popHeight==null) { popHeight=400 }
 	    winX=(screen.width-popWidth)/2
	    winY=(screen.height-popHeight)/2      
      popF = window.open(page, "Window", "width="+ popWidth + ",height=" + popHeight + ",resizable=yes,scrollbars=yes,toolbar=no,menubar=no,location=no,top="+winY+",left="+winX);

  }
  return false;
}