function changeText(advance,total,category) {
	if(total==1) {
		return false;
	}
 	var textSpan = document.getElementById("textToChange");
	var description = document.getElementById("description_text");
 	var newText = textSpan.innerHTML;

 	if(advance == 1) {
		document.getElementById("counter").alt = "1";
		if(document.getElementById("rightarrow").src.indexOf("end") != -1) {
			document.getElementById("rightarrow").alt = "off";
			document.getElementById("leftarrow").alt = "on";
			return false;
			}

 		textSpan.innerHTML = ((newText.substring(0,2)).replace(" ","") * 1 + 1) + " " + newText.substring(newText.indexOf('of'),newText.length);
		description.innerHTML = document.getElementById((newText.substring(0,2)).replace(" ","") * 1 + 1).alt;
		document.getElementById("rightarrow").alt = "on";

		

		if(((newText.substring(0,2)).replace(" ","") * 1) + 1 == total) {
			document.getElementById("rightarrow").src = "../images/arrows/arrow_right_end.jpg";
			}
		else {
			document.getElementById("leftarrow").src = "../images/arrows/arrow_left_" + category + ".jpg";
			document.getElementById("rightarrow").src = "../images/arrows/arrow_right_" + category + ".jpg";
			
			}
			document.getElementById("leftarrow").alt = "on";
 		}
 	else {
		document.getElementById("counter").alt = "-1";
		if(document.getElementById("leftarrow").src.indexOf("end") != -1) {
			document.getElementById("leftarrow").alt = "off";
			document.getElementById("rightarrow").alt = "on";
			return false;
		}
	
 		textSpan.innerHTML = ((newText.substring(0,2)).replace(" ","") * 1 - 1) + " " + newText.substring(newText.indexOf('of'),newText.length);
		description.innerHTML = document.getElementById((newText.substring(0,2)).replace(" ","") * 1 - 1).alt;
		document.getElementById("rightarrow").alt = "on";

		if(((newText.substring(0,2)).replace(" ","") * 1) - 1 == 1) {
			document.getElementById("leftarrow").src = "../images/arrows/arrow_left_end.jpg";
			}
		else {
			document.getElementById("leftarrow").src = "../images/arrows/arrow_left_" + category + ".jpg";
			document.getElementById("rightarrow").src = "../images/arrows/arrow_right_" + category + ".jpg";
			}
 		}
}