function download(img) 
{ 
	n = new Image(); 
	return n.src = img; 
} 

// loads pictures automatically when user is idle
function podmien(i, j, z, h, g) 
{ 
 	pa = download(i);
 	pb = download(j);
 	pc = download(z);
 	pd = download(h);
	pe = download(g);
}

function changeHome1(x) 
{
	x.src = "pictures/menu/home1.jpg";
}

function changeHome(x) 
{
	x.src = "pictures/menu/home.jpg";
}

function changePortfolio1(x) 
{
	x.src = "pictures/menu/portfolio1.jpg";
}

function changePortfolio(x) 
{
	x.src = "pictures/menu/portfolio.jpg";
}

function changeAutor1(x) 
{
	x.src = "pictures/menu/autor1.jpg";
}

function changeAutor(x) 
{
	x.src = "pictures/menu/autor.jpg";
}

function changePublikacje1(x) 
{
	x.src = "pictures/menu/publikacje1.jpg";
}

function changePublikacje(x) 
{
	x.src = "pictures/menu/publikacje.jpg";
}

function changeKontakt1(x) 
{
	x.src = "pictures/menu/kontakt1.jpg";
}

function changeKontakt(x) 
{
	x.src = "pictures/menu/kontakt.jpg";
}

function changePicture(x,y)
{
	y.src = x.src;
}

function changePicturePublikacje(x,y)
{
	var path = (x.src).replace(".jpg", "a.jpg");
	y.src = path;
}

function changeArrowBlack(x,y)
{
	if (y == "l")
	x.src = "pictures/portfolio/leftBlack.jpg";
	else
	x.src = "pictures/portfolio/rightBlack.jpg";
}

function changeArrowWhite(x,y)
{
	if (y == "l")
	x.src = "pictures/portfolio/leftWhite.jpg";
	else
	x.src = "pictures/portfolio/rightWhite.jpg";
}

function changeLeft(picNum)
{
	path = document.getElementById(1).src;
	number = path.indexOf(".jpg") - 1;
	rDigit = path.charAt(number);
	lDigit = path.charAt(number-1);
	hDigit = path.charAt(number-2);
	
	if (isNaN(hDigit)) {	
		if (isNaN(lDigit)) {
			j = 5;	
			i = 1;
			n = picNum;
			num = parseInt(rDigit);
			while (j >= 1) {
				if (num == 1) {
					path = "pictures/portfolio/" + n + ".jpg";
				document.getElementById(j).src = path;
				n--;
				j--;
				} else {
					num = parseInt(rDigit) - i;
					path = "pictures/portfolio/" + num + ".jpg";
					document.getElementById(j).src = path;
					j--;
					i++;
				}
			}	
		} else {
			j = 5;
			i = 1;
			while (j >= 1) {
				num = parseInt(lDigit + rDigit) - i;
				path = "pictures/portfolio/" + num + ".jpg";
				document.getElementById(j).src = path;
				j--;
				i++;
			}
		}
	} else {
		j = 5;
		i = 1;
		while (j >= 1) {
			num = parseInt(hDigit + lDigit + rDigit) - i;
			path = "pictures/portfolio/" + num + ".jpg";
			document.getElementById(j).src = path;
			j--;
			i++;
		}		
	}
}

function changeRight(picNum) {
	path = document.getElementById(5).src;
	number = path.indexOf(".jpg") - 1;
	rDigit = path.charAt(number);
	lDigit = path.charAt(number-1);
	hDigit = path.charAt(number-2);
	
	if (isNaN(hDigit)) {
		if (isNaN(lDigit)) {
			j = 1;
			var temp = 1;
			while(j < 6) {
				num = parseInt(rDigit)+ j;
				if (num > picNum) {
					num = temp;
					temp++;
				}
				path = "pictures/portfolio/" + num + ".jpg";
				document.getElementById(j).src = path;
				j++;
			}
		} else {
			j = 1;
			n = 1;
			num = parseInt(lDigit + rDigit);
			while(j < 6) {
				if (num == picNum) {
					path = "pictures/portfolio/" + n + ".jpg";
					document.getElementById(j).src = path;
					n++;
					j++;
				} else {
					num = parseInt(lDigit + rDigit) + j;
					path = "pictures/portfolio/" + num + ".jpg";
					document.getElementById(j).src = path;
					j++;
				}	
			}
		}		
	} else {
		j = 1;
		n = 1;
		num = parseInt(hDigit + lDigit + rDigit);
		while(j < 6) {
			if (num == picNum) {
				path = "pictures/portfolio/" + n + ".jpg";
				document.getElementById(j).src = path;
				n++;
				j++;
			} else {
				num = parseInt(hDigit + lDigit + rDigit) + j;
				path = "pictures/portfolio/" + num + ".jpg";
				document.getElementById(j).src = path;
				j++;
			}	
  		}		
	}
}

function changeLeftPublikacje(picNum)
{
	path = document.getElementById(1).src;
	number = path.indexOf(".jpg") - 1;
	rDigit = path.charAt(number);
	lDigit = path.charAt(number-1);
	if (isNaN(lDigit)) {
	  	j = 5;	
  		i = 1;
  		n = picNum;
  		num = parseInt(rDigit);
  		while (j >= 1) {
  			if (num == 1) {
  				path = "pictures/publikacje/" + n + ".jpg";
   			document.getElementById(j).src = path;
   			n--;
   			j--;
  			} else {
  				num = parseInt(rDigit) - i;
				path = "pictures/publikacje/" + num + ".jpg";
   			document.getElementById(j).src = path;
   			j--;
   			i++;
   		}
  		}	
  	} else {
  		j = 5;
  		i = 1;
  		while (j >= 1) {
  			num = parseInt(lDigit + rDigit) - i;
			path = "pictures/publikacje/" + num + ".jpg";
   		document.getElementById(j).src = path;
   		j--;
   		i++;
  		}
  	}
}

function changeRightPublikacje(picNum) {
	path = document.getElementById(5).src;
	number = path.indexOf(".jpg") - 1;
	rDigit = path.charAt(number);
	lDigit = path.charAt(number-1);
	if (isNaN(lDigit)) {
		j = 1;
		var temp = 1;
		while(j < 6) {
			num = parseInt(rDigit)+ j;
			if (num > picNum) {
				num = temp;
				temp++;
			}
			path = "pictures/publikacje/" + num + ".jpg";
   		document.getElementById(j).src = path;
   		j++;
  		}
  	} else {
  		j = 1;
  		n = 1;
  		num = parseInt(lDigit + rDigit);
		while(j < 6) {
			if (num == picNum) {
				path = "pictures/publikacje/" + n + ".jpg";
   			document.getElementById(j).src = path;
   			n++;
   			j++;
   		} else {
				num = parseInt(lDigit + rDigit) + j;
				path = "pictures/publikacje/" + num + ".jpg";
   			document.getElementById(j).src = path;
   			j++;
   		}	
  		}
  	}

}



function belka()
{

	var t = /MSIE (\d+\.\d+);/.test(navigator.userAgent);
	ieversion=new Number(RegExp.$1)
	if(ieversion == 6) {
	//	document.getElementById("div").style.position = 'relative';
	//	document.getElementById("div").style.top = '-15px';
	}
	
	if(navigator.appName == "Netscape") {
		document.getElementById("belkaPortfolio").style.top = '-5px';
		document.getElementById("menuPortfolio").style.top = '-21px';
		document.getElementById("belkaDolnaPortfolio").style.top = '-26px';

	}
	
	if(navigator.appName == "Opera") {
		document.getElementById("mainKontakt").style.top = '0px';
		document.getElementById("belkaKontakt").style.top = '-5px';
		document.getElementById("menuKontakt").style.top = '-20px';
		document.getElementById("belkaDolnaKontakt").style.top = '-25px';
	}
	
}