function isIE(){
    var browser=navigator.appName;
    var b_version=navigator.appVersion;
    var version=parseFloat(b_version);
    if (browser=="Microsoft Internet Explorer"){
        return true;
    }else{
        return false;
    }
}
function scrollTo(id){
	st_img = (id*4)-4;
	if(files.length > st_img){
		$('#img1').attr('src','gallery/fullsize/'+files[st_img]);
	} else {
		$('#img1').attr('src','images/spacer.gif');
	}
	if(files.length > st_img+1){
		$('#img2').attr('src','gallery/fullsize/'+files[st_img+1]);
	} else {
		$('#img2').attr('src','images/spacer.gif');
	}
	if(files.length > st_img+2){
		$('#img3').attr('src','gallery/fullsize/'+files[st_img+2]);
	} else {
		$('#img3').attr('src','images/spacer.gif');
	}
	if(files.length > st_img+3){
		$('#img4').attr('src','gallery/fullsize/'+files[st_img+3]);
	} else {
		$('#img4').attr('src','images/spacer.gif');
	}
	
	$('.nav a:contains("'+id+'")').each(function(){
		$('.nav a:contains("'+curr+'")').each(function(){
			if(this.innerHTML==parseInt(curr)){
				this.style.fontWeight = "normal";
			}
		});
		if(this.innerHTML==parseInt(id)){
			this.style.fontWeight = "bold";
		}
	});
    curr = id;
    return false;
}
function max_img(id){
	st_img = ((curr-1)*4)+parseInt(id);
	path = 'gallery/fullsize/'+files[st_img-1];
	$('#pic').attr({'src':path});
    return false;
}
function close_loading(){
    if(!first_run){    	
        $('.pic .loading').css('display','none');
        $('#pic').css('display','block');
    } else {
        first_run = false;
    }

    return false;
}
function prev(){
    if(curr > 1){       
        scrollTo(curr-1);
    }
    return false;
}
function next(){
    if(curr < total){        
        scrollTo(curr+1);
    }
    return false;

}