function openBook(cat,chapter){
		if(cat==1){
			switch (chapter){
				case 1:
					openWin('catalogues/up_kap01.html',1000,750);
					break;
				case 2:
					openWin('catalogues/up_kap02.html',1000,750);
					break;
				case 3:
					openWin('catalogues/up_kap03.html',1000,750);
					break;
				case 4:
					openWin('catalogues/up_kap04.html',1000,750);
					break;
				case 5:
					openWin('catalogues/up_kap05.html',1000,750);
					break;
				case 6:
					openWin('catalogues/up_kap06.html',1000,750);
					break;
				case 7:
					openWin('catalogues/up_kap07.html',1000,750);
					break;
				case 8:
					openWin('catalogues/up_kap08.html',1000,750);
					break;
				case 9:
					openWin('catalogues/up_kap09.html',1000,750);
					break;
				case 10:
					openWin('catalogues/up_kap10.html',1000,750);
					break;
				case 11:
					openWin('catalogues/up_kap11.html',1000,750);
					break;
				case 12:
					openWin('catalogues/up_kap12.html',1000,750);
					break;
				case 13:
					openWin('catalogues/up_kap13.html',1000,750);
					break;
				case 14:
					openWin('catalogues/up_kap14.html',1000,750);
					break;
				case 15:
					openWin('catalogues/up_kap15.html',1000,750);
					break;
				default:
					alert("Ingen katalog vald.");
					break;
			}
		}else if(cat==2){
			switch (chapter){
				case 1:
					openWin('catalogues/01_kap_en.html',1000,750);
					break;
				case 2:
					openWin('catalogues/02_kap_en.html',1000,750);
					break;
				case 3:
					openWin('catalogues/03_kap_en.html',1000,750);
					break;
				case 4:
					openWin('catalogues/04_kap_en.html',1000,750);
					break;
				case 5:
					openWin('catalogues/05_kap_en.html',1000,750);
					break;
				case 6:
					openWin('catalogues/06_kap_en.html',1000,750);
					break;
				case 7:
					openWin('catalogues/07_kap_en.html',1000,750);
					break;
				default:
					alert("Ingen katalog vald.");
					break;
			}
		// Komeg
		}else if(cat==3){
			switch (chapter){
				case 1:
					openWin('catalogues/KO_Renishaw.html',1000,750);
					break;
				case 2:
					openWin('catalogues/KO_Zeiss.html',1000,750);
					break;
				case 3:
					openWin('catalogues/KO_Tillbehor.html',1000,750);
					break;
				default:
					alert("Ingen katalog vald.");
					break;
			}
		}
	}