var selectedArea = "none";


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


/* showLayers() set the visibility of a layer to show.
 */ 
function showLayer (lyr)
{
    // Check to make sure that the page has been fully constructed.
    if (loadingDone) {
	
	// code for Netscape 4.x
	if (mBrowser.isNS && !mBrowser.isNS6) {
	    eval("document."+lyr+".visibility = 'show'");	
	}
	
	// code for Internet Explorer 4+	
	else if (mBrowser.isIE) {
	    eval("document.all."+lyr+".style.visibility = 'VISIBLE'");	
	}
	
	// code for Netscape 6
	else if (mBrowser.isNS6) {		    
	    eval("document.getElementById(lyr).style.visibility = 'VISIBLE'");	
	}
    }
}

/* showLayers() set the visibility of a layer to hidden.
 */ 
function hideLayer(lyr)
{
    // Check to make sure that the page has been fully constructed.
    if (loadingDone) {
	
	// code for Netscape 4.x
	if (mBrowser.isNS && !mBrowser.isNS6) {
	    eval("document."+lyr+".visibility = 'hide'");
	}
	
	// code for Internet Explorer 4+
	else if (mBrowser.isIE) {
	    eval("document.all."+lyr+".style.visibility = 'HIDDEN'");	
	}

	// code for Netscape 6
	else if (mBrowser.isNS6) {	
	    eval("document.getElementById(lyr).style.visibility = 'hidden'");	
	}
    }
}



// Moves a the layer "unadjustedDiv" to the Y position of the image "positionedImage".
function adjustLayerTop(unadjustedDiv, positionedImage) {

if (mBrowser.isNS) {
	eval("document.layers."+unadjustedDiv+".y = document.images[positionedImage].y");
}

else if (mBrowser.isIE) {

// find out positioning of the image in its container
	eval("positionedElement = document.all."+positionedImage);
	yPosition = positionedElement.offsetTop;

// set through each parent container and find out its positioning within its parent
	while (positionedElement.offsetParent != null) {
	 	yPosition += positionedElement.offsetParent.offsetTop;
 		positionedElement = positionedElement.offsetParent;
 		//alert(unadjustedDiv+" y position = "+yPosition);
	}
	
	//alert("y position = "+yPosition);

// set the "unadjustedDiv" to the sum of all the offsets.
		eval("document.all."+unadjustedDiv+".style.pixelTop = yPosition");
	}
}	





function rolloffArea(imgName, newFile){
	if (selectedArea != imgName) {
		MM_swapImgRestore();
	}
}


function clickArea(imgName){
	if (selectedArea != imgName && selectedArea != "none") {
		MM_swapImage (selectedArea, "", ""+selectedArea+"a.gif");
		hideLayer (selectedArea+"Div");
	}
	selectedArea = imgName;
	MM_swapImage (imgName, "", ""+imgName+"b.gif");
	showLayer(selectedArea+"Div");
}

function getQueryString(){ 
        zquery = parent.location.search; 
        zquery = zquery.substring(1,zquery.length); 
        return (zquery); 
} 


function goToTutorialPage(url){
	if (url == "tools.html" || url=="index.html" || url == "tools_sp.html" || url=="index_sp.html") {
		document.location = "/tools/"+destinationTool+"/"+url;
	} else {
		document.location = url+"?"+destinationTool;
	}
}