var slider_qt_quadros = 0;
var slider_quadro_atual = 1;
var slider_speed = 70;
var slider_px_atual = 0;
var slider_destino=0;
var slider_px_width=0;
var slider_class = "";


function sliderSetSpeed(s){
	slider_speed=s;
	return true;
}

function sliderSetSliderId(c){
	slider_class=c;
	return true;
}

function sliderSetQtQuadros(i){
	slider_qt_quadros = i;
	return true;
}

function sliderSetImageWidth(px){
	slider_px_width=px;
	return true;
}


function sliderNext(){
	if (slider_quadro_atual<slider_qt_quadros){
		slider_quadro_atual++;
	}else{
		slider_quadro_atual=1;
	}
	mov();
	return true;
}
		
function sliderPrev(){
	if (slider_quadro_atual>1){
		slider_quadro_atual--;
	}else{
		slider_quadro_atual=slider_qt_quadros;
	}
	mov();
	return true;
}
		
		
		
function mov(){
	slider_destino = ((slider_quadro_atual*slider_px_width)-slider_px_width)*-1;
	if (slider_px_atual > slider_destino){
		slider_px_atual = slider_px_atual-slider_speed;
			if (slider_px_atual<slider_destino){
				slider_px_atual = slider_destino;
			}
	}else if (slider_px_atual<slider_destino){
		slider_px_atual = slider_px_atual+slider_speed;
			if (slider_px_atual>slider_destino){
				slider_px_atual = slider_destino;
			}
	}
	
	document.getElementById(slider_class).style.left = slider_px_atual;			
		
	
	if (slider_px_atual != slider_destino){
		setTimeout("mov()",20);
	}
	
	return true;		
}