/**


 *  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; 


}