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];}
}



/*
The ultimate DHTML drop-down code
Nick Nettleton
www.computerarts.co.uk || www.fluid7.co.uk
--
This must be the single most requested bit of code in the history of Computer Arts, so we've decided to make it user-friendly and adaptable for everyone. Stacks more goodies to come too - head to one of the above sites for regular infoa nd updates.
Works with v4 and v5 browsers - both IE and NS. Update for NS6 coming. Also, be aware there's no way to automatically centre layers in the window - a JS for this coming soon. In the meantime, stick with left-aligned.
Keep an eye out for update for NS6.
--
You can adapt, use and distribute this code under GNU public licence, as long as:
(1) You leave all the comment and credit lines in, including these ones
(2) You don't sell it for profit
--
If you want to tweak the code yourself, use the f7_droplayer to set the names of the dropdowns, and just call f7_showdrop(n) and f7_hdidedrop from onmouseover, onmouseout and other events. Swap n for the number of the layer as in the array.
--
Enjoy!!!
*/

//names of dropdowns stored here
f7_droplayer=new Array()
f7_droplayer[0]="drop1"
f7_droplayer[1]="drop2"
f7_droplayer[2]="drop3"

//simple browser check
f7_v4=(parseInt(navigator.appVersion)>=4 && parseInt(navigator.appVersion)<=5)?1:0
f7_ie=(document.all && f7_v4)?1:0
f7_ns=(document.layers && f7_v4)?1:0


//code for drops

function f7_showdrop(thelayer){
	f7_keep=thelayer; f7_hideall(); f7_showitnow=1
	f7_showit(thelayer)
	}

function f7_showit(thelayer){
		if(f7_ie){ eval(f7_droplayer[thelayer]+'.style.visibility="visible"') }
		if(f7_ns){ eval('document.'+f7_droplayer[thelayer]+'.visibility="show"');}
	}


function f7_hidedrop(){
	f7_keep=-1; setTimeout('f7_hideall()',300)
	}

f7_keep=-1

function f7_hideall(){
	for(i=0;i<f7_droplayer.length;i++){  
		f7_hideit=0; f7_checkmousepos(i)
		if(f7_ie && f7_keep!=i){ 
			if(f7_hideit){ eval(f7_droplayer[i]+'.style.visibility="hidden"') } 
			}
		if(f7_ns && f7_keep!=i){ 
			if(f7_hideit){ eval('document.'+f7_droplayer[i]+'.visibility="hide"') }
			}
		}
	}

//deal with cursor over layer
document.onmousemove = f7_getmousepos
if (f7_ns) document.captureEvents(Event.MOUSEMOVE)

function f7_getmousepos(e){
	if(f7_ns){f7_mousex=e.pageX; f7_mousey=e.pageY}
	if(f7_ie){f7_mousex=event.clientX; f7_mousey=event.clientY;}
	}

function f7_checkmousepos(i){          
	if(f7_ns){     
		f7_x_min=eval('document.'+f7_droplayer[i]+'.left')
		f7_x_max=f7_x_min+eval('document.'+f7_droplayer[i]+'.clip.width')
		f7_y_min=eval('document.'+f7_droplayer[i]+'.top')
		f7_y_max=f7_y_min+eval('document.'+f7_droplayer[i]+'.clip.height')
		}    
	if(f7_ie){     
		f7_x_min=eval(f7_droplayer[i]+'.style.pixelLeft')
		f7_x_max=f7_x_min+eval(f7_droplayer[i]+'.style.pixelWidth')
		f7_y_min=eval(f7_droplayer[i]+'.style.pixelTop')
		f7_y_max=f7_y_min+eval(f7_droplayer[i]+'.style.pixelHeight')
		}
	if (f7_mousex>=f7_x_min && f7_mousex<=f7_x_max && f7_mousey>=f7_y_min && f7_mousey<=f7_y_max){
		f7_hideit=0; setTimeout('f7_hideall()',500)
		}
	else { f7_hideit=1 }
	return f7_hideit
	}


//browser stylesheets

if(f7_ie){
document.write('<style type="text/css"><!--')

document.write('.dropdown {padding-left:10px; padding-top:10px; padding-right:10px; padding-bottom:10px}')
document.write('p { margin-top:6px; margin-bottom:6px }')
document.write('a { color: white; text-decoration: none }')
document.write('a:hover { color: white; text-decoration: none }')
document.write('--></style>')
}