var ma=new Array();
var mx=new Array();
var my=new Array();
var mc=new Array();
var mpos=new Array();
var mal=0;
var main=0;
var menuw=200;
var psrc=0;
var pname="";
var al="";
var gd=0;
var gx,gy;
var d=document;
var NS7=(!d.all&&d.getElementById);
var NS4=(!d.getElementById);
var IE5=(!NS4&&!NS7&&(navigator.userAgent.indexOf('MSIE 5.0')!=-1||navigator.userAgent.indexOf('MSIE 5.2')!=-1));
var IE5p5=(!NS4&&!NS7&&navigator.userAgent.indexOf('MSIE 5.5')!=-1);
var NS6=(NS7&&navigator.userAgent.indexOf('Netscape6')!=-1);
var SAF=navigator.userAgent.indexOf('Safari')!=-1;p=navigator.userAgent.indexOf('Opera');
if(p>-1)
{   p=navigator.userAgent.charAt(p+6);
    if(p>6)NS7=1;
    else NS4=1;
}
var ifr=(!NS7&&!NS4&&!IE5&&!IE5p5);
var quirk=(d.compatMode&&d.compatMode=="BackCompat")||IE5||IE5p5;

function startMainMenu(file,h,w,dir,space,align)
{
    if(w>0)menuw=w;
        main=dir;
    if(main==1||main==2)
        d.write("<table border=\"0\" cellspacing=\""+space+"\" cellpadding=\"0\">");
    if(file!="")
    {
        al="";
        if(align==1)
            al=" align=\"right\"";
        if(align==2)
            al=" align=\"center\"";
        if(main==1||main==2)
            d.write("<tr style='line-height:1px'><td"+al+">");
        d.write("<img src=\""+loc+file+"\" border=\"0\"");
        if(h>0)
            d.write(" height=\""+h+"\"");
        if(w>0)d.write(" width=\""+w+"\"");
            d.write(" />");
        if(main==1||main==2)
            d.write("</td>");
        if(main==1)
            d.write("</tr>");
        if(main==3)
            d.write("<br />");
     }
}

function endMainMenu(file,h,w){if(file!="")
{
    if(main==1) 
        d.write("<tr>");
    if(main==1||main==2)
        d.write("<td"+al+">");
    d.write("<img src=\""+loc+file+"\" border=\"0\"");
    if(h>0)
        d.write(" height=\""+h+"\"");
    if(w>0)
        d.write(" width=\""+w+"\"");
    d.write(" />");
    if(main==1||main==2)
        d.write("</td></tr>");}
    if(main==1||main==2)
        d.write("</table>");
    main=0;
}

function mainMenuItem(name,ext,h,w,url,tar,alt,dir,state,s)
{
    if(NS4&&main==0)
        return;
    var isgraphic=ext.charAt(0)==".";
    if(main==1)
        d.write("<tr>");
    if(main==1||main==2)
        d.write("<td"+al+">");
    d.write("<a ");
    if(url!=""||!isgraphic)
    {
        if(typeof(clx)!="undefined")
        {
            url="?"+clx;tar="";
            alt="Click to edit";
        }
        d.write("href=\""+url+"\" ");
    }
    if(tar!="")
        d.write("target=\""+tar+"\" ");
    d.write("onmouseout=\"");
    if(dir>0)
        d.write("tidyMenu(event);");
    d.write("\" onmouseover=\"");
    if(dir>0)
        d.write("openMenu(event, '"+name+"',"+dir+","+bc+","+fc+");");
    if(state>1&&isgraphic)
    {
        d[name+"_over"]=new Image();
        d[name+"_over"].src=loc+name+"_over"+ext;
        d.write("setGraphic(event, '"+loc+name+"_over"+ext+"');");
    }
    d.write("return false;\"");
    if(!isgraphic)d.write(" class=\""+s+"\" style=\"width:"+(w>0?w:menuw)+"px\"");
        d.write(">");
    if(isgraphic)
    {
        d.write("<img src=\""+loc+name+ext+"\" border=\"0\"");
        if(h>0)
            d.write(" height=\""+h+"\"");
        if(w>0)
            d.write(" width=\""+w+"\"");
        if(alt!="")
            d.write(" alt=\""+alt+"\"");
        d.write(" />");
    }
    else
    {
        d.write("&nbsp;"+ext+"&nbsp;");
    }
    d.write("</a>");
    if(main==1||main==2)
        d.write("</td>");
    if(main==1)
        d.write("</tr>");
    if(main==3)
        d.write("<br />");
}

function startSubmenu(name,style,sw)
{
    var depth=name.split("_").length+1000;
    if(NS4)return;
    if(sw>0)menuw=sw;d.write("<div id=\""+name+"\" class=\""+style+"\"  style=\"z-index:"+depth+";width:"+(menuw+(NS7?bd*2:0))+"px\">");
}

function endSubmenu(name)
{
    if(NS4)return;
        d.write("</div>");
    if(!NS7)
        d.getElementById(name).onmouseout=tidyMenu;
}

function submenuItem(text,url,tar,s)
{
    if(NS4)return;
    if(text.charAt(0)=='<')
        d.write(text);
    else if(text=="---")
        d.write("<div class=\""+s+"\" style=\"width:"+menuw+"px\"><center><img src=\""+loc+"---.jpg\" height=\"8\" width=\""+(menuw-6-(2*bd))+"\" border=0/></center></div>");
    else
    {
        d.write("<a ");
        if(url!="")
            d.write("href=\""+url+"\" ");
        if(tar!="")
            d.write("target=\""+tar+"\" ");
        d.write("class=\""+s+"\" style=\"width:"+menuw+"px\">&nbsp;"+text+"&nbsp;</a>");
    }
}
function setGraphic(event,name)
{
    if(NS4)
        return;
    psrc=(NS7)?event.target:event.srcElement;
    pname=psrc.src;
    if(NS7)
        event.target.src=name;
    else 
        event.srcElement.src=name;
}

function openMenu(event,id,pos,bc,fc)
{   
    if(NS4)
        return;
    var el,x,y,dx,dy;
    var bwidth;
    if(gd==0||mal==0)
    {
        var p=d.getElementById(id);
        gx=0;
        gy=0;
        while(!SAF&&p&&p.offsetParent)
        {
            p=p.offsetParent;
            gx+=p.offsetLeft;
            gy+=p.offsetTop;
        }
        if(p)gd=1;
     }
     if(mal>0)
     {
        el=d.getElementById(ma[mal-1]);
        if(mx[mal-1]!=el.offsetLeft||my[mal-1]!=el.offsetTop)
        {
            el.style.left=mx[mal-1]+"px";el.style.top=my[mal-1]+"px";
        }
        tidyMenu(event);
     }
    if(mal>1)
        pos=mpos[mal-1];
    if(NS7)
    {
        bwidth=window.innerWidth;
        var p=event.target;
        if(p.nodeName!="A"&&p.nodeName!="IMG"&&p.parentNode.nodeName=="A")
            p=p.parentNode;
        dx=p.offsetWidth;
        dy=p.offsetHeight;
        if(mal==0)
        {
            x=p.x;
            y=p.y;
            if(typeof(p.x)=="undefined"||(!NS6&&!SAF))
            {
                x=p.offsetLeft;y=p.offsetTop;
                while(!NS6&&p.parentNode.nodeName!="BODY")
                {
                    p=p.parentNode;
                    if(p.nodeName=="TD"||p.nodeName=="TABLE")
                    {
                        x+=p.offsetLeft;
                        y+=p.offsetTop;
                    }
                }
            }
        }
         else{el=d.getElementById(ma[mal-1]);
            x=el.offsetLeft;y=el.offsetTop+p.offsetTop;
    }
    if(pos!=3)
        x-=bd;
    if(pos==3&&mal>0)x+=bd;
    }
    else
    {
        bwidth=document.body.clientWidth;
        x=event.clientX-event.offsetX-d.body.clientLeft-gx;
        y=event.clientY-event.offsetY-d.body.clientTop-gy;
        dx=event.srcElement.offsetWidth;dy=event.srcElement.offsetHeight;
        if(!quirk)
        {
            x+=d.documentElement.scrollLeft-2;y+=d.documentElement.scrollTop-2;
        }
        else
        {
            x+=d.body.scrollLeft;
            y+=d.body.scrollTop;
        }
        if(mal>0)
        {
            y-=bd;
            if(pos!=3)
                x-=2*bd;
        }
     }
     el=d.getElementById(id);
     if(el&&el.style.visibility!="visible")
     {
        if(pos==1)
        {
            x+=dx;
            el.style.left=x-el.offsetWidth+"px";
            el.style.top=y+"px";
            nspeed=el.offsetWidth/frames;
            if(x+gx+el.offsetWidth>bwidth)
            {
                x-=dx;pos=3;
            }
         }
         else if(pos==2)
         {
            y+=dy;el.style.left=x+"px";
            el.style.top=y-el.offsetHeight+"px";
            nspeed=el.offsetHeight/frames;
         }
         if(pos==3)
         {
            x-=el.offsetWidth;el.style.left=x+el.offsetWidth+"px";
            el.style.top=y+"px";
            nspeed=el.offsetWidth/frames;
            if(x+gx<0)
            {
                x+=el.offsetWidth;pos=1;
                x+=dx;
                el.style.left=x-el.offsetWidth+"px";
                el.style.top=y+"px";
                nspeed=el.offsetWidth/frames;
             }
        }
        mx[mal]=x;
        my[mal]=y;
        if(NS7||IE5||frames==0)
        {
            el.style.left=x+"px";
            el.style.top=y+"px";
        }
        if(!IE5)
            clipMenu(mal,el);
            el.style.visibility="visible";
            ma[mal]=id;
            mpos[mal]=pos;
            if(NS7)
            {
                var p=event.target;
                if(p.nodeName!="A"&&p.parentNode.nodeName=="A")
                    p=p.parentNode;
                mc[mal]=p.style;
                if(!NS6&&mal>0)
                {
                    mc[mal].backgroundColor="#"+bc.toString(16);
                    mc[mal].color="#"+fc.toString(16);
                }
                el.onmouseout=tidyMenu;
            }
        else
        {
            mc[mal]=event.srcElement.style;
            if(mal>0)
            {
                mc[mal].backgroundColor=bc;mc[mal].color=fc;
            }
        }
        mal++;
    }
    if(ifr&&el&&frames==0&&(typeof(tr)=="undefined"||tr==""))
    {
        var p=d.getElementById(id+"i");
        if(p)
        {
            p.style.top=y+"px";
            p.style.left=x+"px";
            p.style.width=el.style.width;
            p.style.height=el.offsetHeight+"px";
            p.style.display="block";
        }
        else
        {
            ifr="<iframe id=\""+id+"i\" style=\"position:absolute;left:"+x+"px;width:"+el.style.width+";height:"+el.offsetHeight+"px;top:"+y+"px;z-index:998;display:block;\" scrolling=\"no\" frameborder=\"0\"></iframe>";el.insertAdjacentHTML('beforeBegin',ifr);
        }
   }
}
            
function overMenu(x,y)
{
    x-=gx;
    var OP8=navigator.userAgent.indexOf('Opera')!=-1;
    if(SAF||OP8)
    {
        if(SAF)
        {
            y-=gy-10;
        }
        else
        {
            y-=gy-5;
        }
    }
    else
    {
        y-=gy;
    }
    for(i=mal-1;i>=0;i--)
    {
        var el=d.getElementById(ma[i]);
        if(el.offsetLeft+el.offsetWidth>x&&el.offsetLeft<=x&&el.offsetTop+el.offsetHeight>y&&el.offsetTop<=y)
        {
            return ma[i];
        }
    }
    return "";
 }
 
 function tidyMenu(e)
 {
     if(NS4)
        return;
     if(NS7)
     {
        t=overMenu(e.pageX,e.pageY);
        if(t!=""&&(e.target.firstChild==e.relatedTarget||e.target==e.relatedTarget.firstChild))
            return;
     }
     else
     {
        var x=event.clientX-d.body.clientLeft;
        var y=event.clientY-d.body.clientTop;
        if(!quirk)
        {
            x+=d.documentElement.scrollLeft-2;
            y+=d.documentElement.scrollTop-2;
        }
        else
        {
            x+=d.body.scrollLeft;y+=d.body.scrollTop;
        }t=overMenu(x,y);
    }
    om=0;
    for(i=0;i<mal;i++)
    {
        var mail=ma[i].length;
        if(mail>t.length||t.substring(0,mail)!=ma[i])
        {
            var el=d.getElementById(ma[i]);
            el.style.visibility="hidden";
            mc[i].backgroundColor="";
            mc[i].color="";
            if(ifr)
            {
                var p=d.getElementById(ma[i]+"i");
                if(p)p.style.display="none";
            }
        }
        else
        {
            ma[om]=ma[i];
            mx[om]=mx[i];
            my[om]=my[i];
            om++;
        }
    }mal=om;
    if(mal==0&&psrc)
        psrc.src=pname;
}

function animate()
{
    for(i=0;i<mal;i++)
    {
        var el=d.getElementById(ma[i]);
        if(el.style.visibility=="visible")
        {
            if(el.offsetLeft<mx[i])
                el.style.left=Math.min(el.offsetLeft+nspeed,mx[i])+"px";
            if(el.offsetLeft>mx[i])
                el.style.left=Math.max(el.offsetLeft-nspeed,mx[i])+"px";
            if(el.offsetTop<my[i])el.style.top=Math.min(el.offsetTop+nspeed,my[i])+"px";
                clipMenu(i,el);
        }
    }
    if(mal!=0||frames!=0)
        setTimeout("animate()",50);
}

function clipMenu(i,el)
{
    if(el.offsetLeft>mx[i])
        el.style.clip="rect("+(my[i]-el.offsetTop)+"px "+(el.offsetWidth+(mx[i]-el.offsetLeft))+"px "+el.offsetHeight+"px "+0+"px)";
    else 
        el.style.clip="rect("+(my[i]-el.offsetTop)+"px "+el.offsetWidth+"px "+el.offsetHeight+"px "+(mx[i]-el.offsetLeft)+"px)";
}

var myarray = new Array(7);
myarray[0] = "Roll over the icons here to explain the types of content.";
myarray[2] = "Move up the learning path a step at a time.";
myarray[3] = "Interact with and understand the concepts you're learning.";
myarray[1] = "Get on the right track to understanding a whole<br> Key Stage 3 topic.";
myarray[4] = "Complete lessons in a topic for Key Stage 4 students.";
myarray[5] = "Kick start your exam preparation with skoool Study Notes.";

function changespan(varInt)
{
document.getElementById("ospan").innerHTML  = myarray[varInt];
}


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_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_findObj(n, d) { //v4.01
  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 && d.getElementById) x=d.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];}
}

function WinOpennewv1(filepg) {

open(filepg,"Windownewv1","width=780,height=570,resize,toolbar=no,scrollbars=no,status=no,menubar=no");

}
function newAlert(filepg)
{
	ConfirmStatus = confirm("You are about to view a site \n that is external to the skoool.co.uk web site.\n skoool.co.uk takes no responsibility for the\n content displayed on external sites.")

	if (ConfirmStatus == true) 
	{
	window.open(filepg, 'externalsite');	
	}
}
function newAlert2(filepg)
{
	ConfirmStatus = confirm("You are about to view a site \n that is external to the skoool.co.uk web site.\n skoool.co.uk takes no responsibility for the\n content displayed on external sites.")

	if (ConfirmStatus == true) 
	{
	window.open(filepg, 'externalsite');	
	}
}
function WinOpenForReview(filepg) 
{
	if (screen.height <= 480 && screen.width <= 800 )
	{
		open(filepg,"WindowReview","width=700,height='+(screen.availHeight-20) +',left=0,top=0,resize,toolbar=no,scrollbars=no,status=no,menubar=no");
	}
	else
	{
		open(filepg,"WindowReview","width=760,height=500,left=50,top=50,resize,toolbar=no,scrollbars=no,status=no,menubar=no");
	}
}

function openLOWindow(URLtoOpen) 
{
	var pos=URLtoOpen.lastIndexOf("/");
	
	if (pos>=0)	
	{   
	    
		var newstr = URLtoOpen.substring(0,pos)
		URLtoOpena = newstr + "/index.html";
		var pos1=URLtoOpen.lastIndexOf("index.html");
		if (pos1>=0)	
		{
			URLtoOpena = newstr + "/index.html";
			//alert(URLtoOpen);
		}
		var pos2=URLtoOpen.lastIndexOf("index.html");
		if (pos2>=0)	
		{
			URLtoOpena = newstr + "/index.html";
			//alert(pos2);
		}
		URLtoOpen = newstr + "/index.html";
	}
	if (screen.height <= 480 && screen.width <= 800 )
	{
	  newWindow = window.open(URLtoOpen,'LOWin','height='+(screen.availHeight-20) +',width=700,left=0,top=0,toolbar=no,scrollbars=no');
	}
	else
	{
	  newWindow = window.open(URLtoOpen,'LOWin','height=500,width=760,left=50,top=50,toolbar=no,scrollbars=no');
	}

}

function openPDAWindow(URLtoOpen) 
{
	if (screen.height <= 480 && screen.width <= 800 )
	{
		newWindow=window.open(URLtoOpen,'PDAWin','height='+(screen.availHeight-20) +',width=700,left=0,top=0,toolbar=no,scrollbars=no'); 
	}
	else
	{
		newWindow=window.open(URLtoOpen,'PDAWin','height=500,width=760,left=50,top=50,toolbar=no,scrollbars=no'); 
	}
}
function openSIMWindow(URLtoOpen) 
{
	if (screen.height <= 480 && screen.width <= 800 )
	{
		newWindow=window.open(URLtoOpen,'SIMWin','height='+(screen.availHeight-20) +',width=700,left=0,top=0,toolbar=no,scrollbars=no'); 
	}
	else
	{ 
		newWindow=window.open(URLtoOpen,'SIMWin','height=500,width=760,left=50,top=50,toolbar=no,scrollbars=no'); 
	}
}
function openLPWindow(URLtoOpen) 
{ 
	if (screen.height < 768 && screen.width < 1024 )
	{
//		alert("LearnPaths are not available.");
		alert("Screen Resolution must be at least 1024*768 to view the learnpaths. Please change your settings or access the site with another suitable device.");
	}
	else
	{
		newWindow=window.open(URLtoOpen,'LPWin','height=630,width=1002,left=50,top=50,toolbar=no,scrollbars=no'); 
	}
}
function openLWindow(URLtoOpen) 
{ 
	//newWindow=window.open(URLtoOpen,'LWin','height=570,width=778,left=50,top=50,toolbar=no,scrollbars=no'); 
	var pos=URLtoOpen.lastIndexOf("keystage4/maths");
	if (pos>=0)	
	{
		if (screen.height <= 480 && screen.width <= 800 )
		{
			newWindow=window.open(URLtoOpen,'LWin','height='+(screen.availHeight-20) +',width=655,left=0,top=0,toolbar=no,scrollbars=no'); 
		}
		else
		{
			newWindow=window.open(URLtoOpen,'LWin','height=570,width=778,left=50,top=50,toolbar=no,scrollbars=no'); 
		}
	}
	else
	{
		if (screen.height <= 480 && screen.width <= 800 )
		{
			var pos=URLtoOpen.lastIndexOf("/");
			var newstr = URLtoOpen.substring(0,pos)
			URLtoOpena = newstr + "/h-frame-ie-umpc.htm";
			URLtoOpen = URLtoOpena;
			newWindow=window.open(URLtoOpen,'LWin','height='+(screen.availHeight-20) +',width=765,left=0,top=0,toolbar=no,scrollbars=no'); 
		}
		else
		{
			newWindow=window.open(URLtoOpen,'LWin','height=570,width=778,left=50,top=50,toolbar=no,scrollbars=no'); 
		}
	}
}
function openDemoWindow(URLtoOpen) 
{ 
	if (screen.height <= 480 && screen.width <= 800 )
	{
		newWindow=window.open(URLtoOpen,'dWin','height='+(screen.availHeight-20) +',width=615,left=0,top=0,toolbar=no,scrollbars=no'); 
	}	
	else
	{
		newWindow=window.open(URLtoOpen,'dWin','height=590,width=790,left=50,top=50,toolbar=no,scrollbars=no'); 
	}
}
function openEurekaWindow(URLtoOpen, windowName, windowFeatures) 
{ 
    newWindow=window.open(URLtoOpen, windowName, windowFeatures); 
}
function openNewWindow(URLtoOpen, windowName, windowFeatures) 
{ 
    newWindow=window.open(URLtoOpen, windowName, windowFeatures); 
}

function WinOpennewpda(filepg) 
{
    open(filepg,"Windownewpda","width=390,height=536,resize,toolbar=no,scrollbars=no,status=no,menubar=no");
}

function WinOpennewphone(filepg) 
{
    open(filepg,"Windownewphone","width=285,height=560,resize,toolbar=no,scrollbars=no,status=no,menubar=no");
}

function WM_imageSwap(daImage, daSrc)
{
	var objStr,obj;
	if(document.images)
	{
		if (typeof(daImage) == 'string') 
		{
			objStr = 'document.' + daImage;
			obj = eval(objStr);
			obj.src = daSrc;
		}
		else if ((typeof(daImage) == 'object') && daImage && daImage.src) 
		{
			daImage.src = daSrc;
		}
	}
}
function openks4Window(URLtoOpen) 
{ 
	newWindow=window.open(URLtoOpen,'LWin','height=515,width=770,left=50,top=50,toolbar=no,scrollbars=no'); 
}