/**
 *  Scroll de capes. IE4,5,6 i NS4,6. 
 *  Modificat a partir del codi de David Miles (http://www.z3roadster.net/dreamweaver)   
 * (c) 2002 Xesc Arbona (Lacomba Produccions SL) GNU GPL (http://www.gnu.org/licenses/gpl.txt)
 */
var speed = 50; 
var loop, timer, initialised; 
function verifyCompatibleBrowser(){ 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;  
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5) 
    return this 
} 
var bw = new verifyCompatibleBrowser();
 
function ConstructObject(obj,nest){ 
    nest=(!nest) ? '':'document.'+nest+'.' 
    this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0; 
    this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0; 
    this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight;
    this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight;
    this.scrollWidth=bw.ns4?this.css.document.width:this.el.offsetWidth;
    this.clipWidth=bw.ns4?this.css.clip.width:this.el.offsetWidth; 
	this.up=MoveAreaUp; this.down=MoveAreaDown; this.right=MoveAreaRight; this.left=MoveAreaLeft;
    this.MoveArea=MoveArea; this.x=0; this.y=0; 
    this.obj = obj + "Object" ;
    eval(this.obj + "=this") ;
    return this; 
} 
function MoveArea(x,y){ 
    this.x=x;
	this.y=y;
    this.css.left=this.x 
    this.css.top=this.y 
} 
function MoveAreaDown(move){ 
	if (this.y > -this.scrollHeight+objContainer.clipHeight){ 
    	this.MoveArea(this.x,this.y-move) 
    	if(loop) setTimeout(this.obj+".down("+move+")",speed) 
	} 
} 
function MoveAreaUp(move){ 
	if (this.y < 0){ 
    	this.MoveArea(this.x,this.y-move) 
    	if(loop) setTimeout(this.obj+".up("+move+")",speed) 
	} 
} 
function MoveAreaLeft(move){ 
	if (this.x > -this.scrollWidth+objContainer.clipWidth){ 
    	this.MoveArea(this.x-move,this.y) 
    	if(loop) setTimeout(this.obj+".left("+move+")",speed) 
	} 
} 
function MoveAreaRight(move){ 
	if (this.x < 0) { 
	    this.MoveArea(this.x-move,this.y) 
   		if (loop) setTimeout(this.obj+".right("+move+")",speed) 
	} 
} 
function VerticalScroll(speed){ 
	if(initialised){ 
		loop=true; 
		if(speed>0) objScroller.down(speed) 
		else objScroller.up(speed) 
	} 
}  
function HorizontalScroll(speed){ 
	if(initialised){ 
		loop=true; 
		if(speed>0) objScroller.left(speed) 
		else objScroller.right(speed) 
	} 
}
function VerticalMove(speed){ 
	if(initialised){ 
		loop=false; 
		if(speed>0) objScroller.down(speed) 
		else objScroller.up(speed) 
	} 
}  
function HorizontalMove(speed){ 
	if(initialised){ 
		loop=false; 
		if(speed>0) objScroller.left(speed) 
		else objScroller.right(speed) 
	} 
} 
 
function StopScroll(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
} 
function InitScrollableArea(){ 
    objContainer=new ConstructObject('divContainer') 
    objScroller=new ConstructObject('divContent','divContainer') 
    objScroller.MoveArea(0,0) 
    objContainer.css.visibility='visible' 
    initialised=true; 
}