///////////////////////////////
//   MMI - WWW.MMIWEB.COM    //
//      --------------       //
//         Contains          //
// almost all the javascript //
//    used for this site     //
///////////////////////////////

function stylesheetchooser()
{
  if(navigator.userAgent.indexOf('Mac') == 1)
  { 
	document.write ('<link rel="stylesheet" href="stylesheets/macnet.css">')
  }

  else if(navigator.userAgent.indexOf('Mac') != 1)
  { 
	if (navigator.appName == "Netscape")
	{
		document.write ('<link rel="stylesheet" href="stylesheets/macnet.css">')
	}
		else
	{
		document.write ('<link rel="stylesheet" href="stylesheets/ontak_style.css">')
	}
  }
}


function re()
{
	popwins('rewin.htm',516,400,'re')
}

function p(currentimage)
{
mystring =("./structure/" +currentimage+ ".htm")
popwins(mystring,539,400,"execpage")
}


function updatecookie(pageentered)
{
	var cookie1 = ""
	cookie1 = getCookie("version") 
	setCookie("lastpage",cookie1) 
	setCookie("page",pageentered) 
}




function return_to_menu()
{
var cookie1 = ""
cookie1 = getCookie("version") 

	if (cookie1 == 'flash')
	{
				document.location.href = "http://www.gcal.ac.uk/home.html";
	}
		else
	{
				document.location.href = "http://www.gcal.ac.uk/home_dhtml.html";
	}
}


function return_to_menu_nested()
{
var cookie1 = ""
cookie1 = getCookie("version") 

	if (cookie1 == 'flash')
	{
				document.location.href = "http://www.gcal.ac.uk/home.html";
	}
		else
	{
				document.location.href = "http://www.gcal.ac.uk/home_dhtml.html";
	}
}




function popwin(page,wid,hght,winname)
{
	w=window.open(page, winname, "width="+wid+",height="+hght+",scrollbars=no");
	w.focus();
}

function popwins(page,wid,hght,winname)
{
	w=window.open(page, winname, "width="+wid+",height="+hght+",scrollbars=yes");
	w.focus();
}

  function getCookie(name) 
{
    name += "="; // append '=' to name string
    var i = 0; // index of first name=value pair

    while (i < document.cookie.length) 
	{
      		var offset = i + name.length;
      		if (document.cookie.substring(i, offset) == name) 
		{ 		
        		var endstr = document.cookie.indexOf(";", offset);
        		if (endstr == -1) endstr = document.cookie.length;
          		return unescape(document.cookie.substring(offset, endstr)); 
        	}
        i = document.cookie.indexOf(" ", i) + 1; // move i to next name=value pair
        if (i == 0) break; // no more values in cookie string
      }

    return null;
}




function setCookie(name, value) 
{
var today = new Date();
var expiry = new Date(today.getTime() + 28 * 24 * 60 * 60 * 1000);
    
	if (value != null && value != "")
      document.cookie=name + "=" + escape(value) + "; expires=" + expiry.toGMTString();
    document.cookie = document.cookie; 
}

//------------------------------------------------------------------------------------------------------------------------------------------------------------------------ MOVE CODE

textnow = 1
layerRef = ""
styleRef = ""
currentstep = 0
alreadygoing = "stopped"
needout = "nope"
overvtour = 1
moremoves = 0
nextmove = ""
oktoshow = 0


function browsertype()
{
}

if (navigator.appName == "Netscape")
{
	layerRef = ".layers"
	styleRef = ""
}
	else
{
	layerRef = ".all"
	styleRef = ".style"
}


function calc(end_left,end_top,step,layerNames,speed)																	
{
	if (alreadygoing == "moving")
	{ 
			return
		if (needout == "yip")
			{
				return
			}
				
	}
		else
	{
	alreadygoing = "moving"
	start_top = eval("document" + layerRef + "['" + layerNames + "']" + styleRef + ".top")
	start_left = eval("document" + layerRef + "['" + layerNames + "']" + styleRef + ".left")

	start_left = parseInt(start_left)
	start_top = parseInt(start_top)


if (start_left > end_left)
{
																		// we are moving the layer < /\
	end_left =  end_left -  start_left
	end_top =  end_top -  start_top 

}
else
{
																		// we are moving the layer > \/
	end_left =   start_left -  end_left
	end_left = 0 - end_left
	end_top =   start_top - end_top 
	end_top= 0 - end_top
}

	step_size_left = end_left / step
	step_size_top = end_top / step

	move (layerNames,step_size_left,step_size_top,start_left,start_top,step,speed)	
}
}

function move(layerNames,step_size_left,step_size_top,start_left,start_top,step,speed)  																
{		

		start_left = start_left + step_size_left	
		start_top = start_top + step_size_top

		temp_left = Math.round(start_left)
		temp_top = Math.round(start_top)

		eval ("document" + layerRef + "['" + layerNames + "']" + styleRef + ".top = " + temp_top)
		eval ("document" + layerRef + "['" + layerNames + "']" + styleRef + ".left = " + temp_left)
		currentstep ++

	if (currentstep < step)  
	{
			jim =  ("move ('" + layerNames+ "'," + step_size_left + "," + step_size_top +  "," + start_left + "," + start_top + "," + step + ","  + speed + ")")
			setTimeout(jim,speed)
	}
		else
	{
		currentstep = 0
		alreadygoing = "stopped"

		if (moremoves == 1)
		{
			moremoves = 0
			movesmade = 0
			eval(nextmove)
		}
		else
		{
			moremoves = 0
			return
		}
	}
}
//------------------------------------------------------------------------------------------------------------------------------------------------------------------------ END  MOVE CODE

function MM_findObj(n, d) { //v3.0
  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); return x;
}
/* Functions that swaps images. */
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 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;
}

/* Functions that handle preload. */
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_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

//--------------------------------------------------------------------------------------------------------------------------------------------------------------------- other home made functions

function button1_over()      //-----------------------------------   layer 1
{
needout = "nope"
MM_showHideLayers('b1text','','show')
MM_showHideLayers('b1roll','','show')
moremoves = 1
nextmove = "calc(240,68,10,'b1text',1)"
calc(380,68,5,'b1text',1)
}

function button1_out()
{
calc(-120,68,1,'b1text',1)
MM_showHideLayers('b1text','','hide')
MM_showHideLayers('b1roll','','hide')
MM_swapImgRestore()
moremoves = 0
needout = "yip"
}

function button2_over()      //-----------------------------------   layer 2
{
needout = "nope"
MM_showHideLayers('b2roll','','show')
MM_showHideLayers('b2text','','show')
moremoves = 1
nextmove = "calc(240,68,10,'b2text',1)"
calc(380,68,5,'b2text',1)
}

function button2_out()
{
calc(-120,68,1,'b2text',1)
MM_showHideLayers('b2text','','hide')
MM_showHideLayers('b2roll','','hide')
MM_swapImgRestore()
moremoves = 0
needout = "yip"
}

function button3_over()      //-----------------------------------   layer 3
{
needout = "nope"
MM_showHideLayers('b3text','','show')
MM_showHideLayers('b1roll','','show')
MM_swapImgRestore()
moremoves = 1
nextmove = "calc(240,68,10,'b3text',1)"
calc(380,68,5,'b3text',1)
}

function button3_out()
{
calc(-120,68,1,'b3text',1)
MM_showHideLayers('b3text','','hide')
MM_showHideLayers('b1roll','','hide')
MM_swapImgRestore()
moremoves = 0
needout = "yip"
}

function button4_over()      //-----------------------------------   layer 4
{
needout = "nope"
MM_showHideLayers('b2roll','','show')
MM_showHideLayers('b4text','','show')
moremoves = 1
nextmove = "calc(240,68,10,'b4text',1)"
calc(380,68,5,'b4text',1)
}

function button4_out()
{
calc(-120,68,1,'b4text',1)
MM_showHideLayers('b4text','','hide')
MM_showHideLayers('b2roll','','hide')
MM_swapImgRestore()
moremoves = 0
needout = "yip"
}

function hidden()
{
if (oktoshow == 1)
	{
		oktoshow = 5
	}
		else
	{
		oktoshow = 6
	}
}

function message()
{
	alert ("Click this logo at any time to return to this page")
	if (oktoshow == 2)
	{
		oktoshow = 1
	}
	else
	{
		oktoshow = 6
	}
}



function abouttab_over()      //-----------------------------------  About tab
{
needout = "nope"
MM_swapImage('n1st_r09_c011','','images/1st_r09_c01_f2.gif',1);
}

function abouttab_out()
{
MM_swapImgRestore()
needout = "yip"
}

function newstab_over()      //-----------------------------------  News tab
{
needout = "nope"
MM_swapImage('n1st_r09_c031','','images/1st_r09_c03_f2.gif',1);
}

function newstab_out()
{
MM_swapImgRestore()
needout = "yip"
}

function vtour_over()			//-----------------------------------  V tour tab
{
MM_showHideLayers('vtour','','show')
MM_swapImage('n1st_r07_c152','','images/1st_r07_c152_f2.gif',1);
eye()
overvtour = 1
}


function vtour_out()
{
MM_swapImgRestore();
overvtour = 0
setTimeout('checkmouse()',10)
MM_showHideLayers('eye','','hide')
}


function eye()
{
	if (oktoshow == 5)
	{
		MM_showHideLayers('eye','','show')
	}
}


function vtourpop_over()
{
overvtour = 1
}

function vtourpop_out()
{
overvtour = 0
setTimeout('checkmouse()',10)
}

function checkmouse()
{
if  (overvtour == 0)
	{
		MM_showHideLayers('vtour','','hide')
	}
}

function swaptext(direction)      //-----------------------------------  text swapping function
{

	MM_showHideLayers('text1','','hide')
 	MM_showHideLayers('text2','','hide')	
	MM_showHideLayers('text3','','hide')
 	MM_showHideLayers('text4','','hide')	

	if (direction == "next")
		{
			oktoshow = 2
			textnow = textnow + 1
			if (textnow == 5)
				{
					textnow = 1
				}
		}
			else
		{
			oktoshow = 6
			textnow = textnow - 1
			if (textnow == 0)
				{
					textnow = 4
				}
		}
jim = "MM_showHideLayers('text"+ textnow+"','','show')"
eval(jim)
}

function MM_displayStatusMsg(msgStr) { //v1.0
  status=msgStr;
  document.MM_returnValue = true;
}

function MM_callJS(jsStr) { //v2.0
  return eval(jsStr)
}

function MM_callJS(jsStr) { //v2.0
  return eval(jsStr)
}