function leadingZero(number) {
    if (number < 10) {
	    return "0" + number;
	} else {
		return "" + number;
	}
}

function entry_on(displayNumber) {
    for (var i=0 ; i < 15 ; i++) {
	    var divObj = document.getElementById("entry_" + leadingZero(i));
		if (divObj) {
		    if (i == displayNumber) {
				divObj.style.display = "block"; // ggf. inline!
			} else {
				divObj.style.display = "none";
			}
		}
	}
}

function link_on(displayNumber) {
    for (var i=0 ; i < 15 ; i++) {
	    var divObj = document.getElementById("link_" + leadingZero(i));
		if (divObj) {
		    if (i == displayNumber) {
				divObj.style.display = "block"; // ggf. inline!
			} else {
				divObj.style.display = "none";
			}
		}
	}
}

function text_on(displayNumber) {
    for (var i=0 ; i < 15 ; i++) {
	    var divObj = document.getElementById("text_" + leadingZero(i));
		if (divObj) {
		    if (i == displayNumber) {
				divObj.style.display = "block"; // ggf. inline!
			} else {
				divObj.style.display = "none";
			}
		}
	}
}

function edit_on(displayNumber) {
    for (var i=0 ; i < 15 ; i++) {
	    var divObj = document.getElementById("edit_" + leadingZero(i));
		if (divObj) {
		    if (i == displayNumber) {
				divObj.style.display = "block"; // ggf. inline!
			} else {
				divObj.style.display = "none";
			}
		}
	}
}

function iframe_on() {
    document.getElementById("raumsituation").style.display = "block";
	document.getElementById("motto").style.display = "none"; // Zitat ausblenden
}

function element_off() {
    document.getElementById("page00").style.display = "none";
    document.getElementById("page01").style.display = "block";
}

function link_active(displayNumber) {
    for (var i=0 ; i < 50 ; i++) {
	    var linkObj = document.getElementById("a_" + i);
		if (linkObj) {
		    if (i == displayNumber) {
				linkObj.className = "active"; // ggf. inline!
			} else {
				linkObj.className = "link";
			}
		}
	}
}