var slides_pause = false;

function ScrollSlides(obj,math,move,skip){
    if (math=="-"){
	    if (onPage==1){return;}
        onPage = Number(onPage - (1*Number(skip)));
		$(obj+'_navi_prev')._onclick = $(obj+'_navi_prev').onclick;
		$(obj+'_navi_next')._onclick = $(obj+'_navi_next').onclick;
		$(obj+'_navi_prev').onclick = function(){ return false;};
		$(obj+'_navi_next').onclick = function(){ return false;};
		new Effect.MoveBy(obj,move,0,{
		    duration:0.6,transition:Effect.Transitions.slowstop,afterFinish:function(effect){
		        $(obj+'_navi_prev').onclick=$(obj+'_navi_prev')._onclick;
				$(obj+'_navi_next').onclick=$(obj+'_navi_next')._onclick;
			    }
		    });
		if ((onPage==(maxPages-2))||onPage==1) {
		    $(obj+'_navi_next').style.display='inline';
		}
        if (onPage==1){
		    $(obj+'_navi_prev').style.display='none';
		}
	} else if (math=="+") { 
	    if (onPage==maxPages){return;}
        onPage = Number(onPage + (1*Number(skip)));
	    $(obj+'_navi_prev')._onclick = $(obj+'_navi_prev').onclick;
	    $(obj+'_navi_next')._onclick = $(obj+'_navi_next').onclick;
	    $(obj+'_navi_prev').onclick = function(){return false;};
	    $(obj+'_navi_next').onclick = function(){return false;};
	    new Effect.MoveBy(obj,-move,0,{
		    duration:0.6,transition:Effect.Transitions.slowstop,afterFinish:function(effect){
	            $(obj+'_navi_prev').onclick=$(obj+'_navi_prev')._onclick;
		        $(obj+'_navi_next').onclick=$(obj+'_navi_next')._onclick;
			    }
		    });
        if (onPage>=2){
	        $(obj+'_navi_prev').style.display='inline';
	    }
        if ((onPage==maxPages)||maxPages==1){
	        $(obj+'_navi_next').style.display='none';
	    }
    }
}

function SlidesPause(mod) {
    if (mod==0) {
	    slides_pause = true;
	    $('Sildes_Pause').innerHTML = 'reset';
	} else {
	    slides_pause = false;
	    $('Sildes_Pause').innerHTML = '';
	}
}


function SlidesExpandThumb(id,tid) {
    try {
        tooltip = $(id);
        tooltip.style.display = "inline";
    } catch (error) { 
	    error=null; 
	}
}

function SlidesReduceThumb() {
    try {
        tooltip.style.display = "none";
    } catch (error) { 
	    error=null; 
	}
}