/**

 *  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; 

}