// JavaScript Document


var scrolling =0;
var direction ='down';
var area_height=190;

function start_scroll_down()
{
scrolling =1;

this.direction='down';
scroll()
}

function start_scroll_up()
{
	scrolling =1;
	this.direction='up';
	scroll()
}

function scroll()
{
	var content = document.getElementById('scroll_content');
	var height=content.offsetHeight;
	
	var x=content.style.top;
	
	x=x.replace('px', '');
	
	if(x=='')
	{
	 x=0;
	} 
	
	x=parseInt(x);

	if(this.direction=='down')
	{	
		var maxdown =height-area_height;	
		if(maxdown<0)
		{
		maxdown=0;
		}
		
		x=x-5;
	
		if(x<(maxdown*-1))
		{
			x=maxdown*-1;
		}	
	}else if(this.direction=='up')
	{
		//alert('up ' + x);
		x=x+5;		
		if(x>0)
		{
			x=0;
		}
	}
	//alert(height);	
	content.style.top=x +'px';
	
	if(this.scrolling==1)
	{
		timeout1=setTimeout('scroll()', 0100);
	}
}

function scroll_stop()
{
	this.scrolling=0;
}