area.onmousemove = mousehandler;

function mousehandler()
{		
		if(flttgt.filters.item(0).enabled == true) flttgt.filters[0].movelight(1,window.event.x,window.event.y,150,1);	
}


function knopka_light()
{	
		if(flttgt.filters.item(0).enabled == false)
		{				
			flttgt.filters.item(0).enabled = true;
			flttgt.filters[0].clear();
			flttgt.filters[0].addAmbient(255,255,255,20);	
			flttgt.filters[0].addPoint(window.event.x,window.event.y,150,255,255,255,100);		
			butonas_light.value="LightOn";			
		}
		else
		{	
			flttgt.filters.item(0).enabled = false;	
			butonas_light.value="LightOff";
		}	
}

function knopka_invert()
{
		if(flttgt.filters.item(1).enabled==true)
		{
			flttgt.filters.item(1).enabled = false;
			butonas_invert.value="InvertOn";
		}
		else	
		{
			flttgt.filters.item(1).enabled = true;
			butonas_invert.value="InvertOff";
		}	
}

function knopka_gray()
{
		if(flttgt.filters.item(2).enabled==true)
		{
			flttgt.filters.item(2).enabled = false;
			butonas_gray.value="GrayOn";
		}
		else	
		{	
			flttgt.filters.item(2).enabled = true;
			butonas_gray.value="GrayOff";
		}
}

function knopka_alpha()
{	
		if(area.filters.item(0).enabled==true)
		{
	 		area.filters.item(0).enabled = false;
			butonas_alpha_p.disabled=true;
			butonas_alpha_m.disabled=true;
			butonas_alpha.value="AlphaOn";
		}
		else
		{ 
			area.filters.item(0).enabled = true;
			area.filters.alpha.opacity = 100;
			butonas_alpha_m.disabled=false;	
			butonas_alpha.value="AlphaOff";
		}	
}

function knopka_alpha_p()
{
		area.filters.alpha.opacity += 10;
		if(butonas_alpha_m.disabled==true)butonas_alpha_m.disabled=false;	
		if(area.filters.alpha.opacity == 100) butonas_alpha_p.disabled=true;
}

function knopka_alpha_m()
{
		area.filters.alpha.opacity -= 10;
		if(butonas_alpha_p.disabled==true)butonas_alpha_p.disabled=false;
		if(area.filters.alpha.opacity == 0) butonas_alpha_m.disabled=true;
}

function knopka_fliph()
{	
		if(flttgt.filters.item(3).enabled==true) flttgt.filters.item(3).enabled = false;
		else					  flttgt.filters.item(3).enabled = true;	
}

function knopka_flipv()
{	
		if(flttgt.filters.item(4).enabled==true) flttgt.filters.item(4).enabled = false;
		else					  flttgt.filters.item(4).enabled = true;	
}