// PHP Layers Menu 3.0.0 (C) 2001-2003 Marco Pratesi (marco at telug dot it)

DOM = (document.getElementById) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;
// We need to explicitly detect Konqueror
// because Konqueror 3 sets IE = 1 ... AAAAAAAAAARGHHH!!!
Konqueror = (navigator.userAgent.indexOf("Konqueror") > -1) ? 1 : 0;
// We need to detect Konqueror 2.1 and 2.2 as they do not handle the window.onresize event
Konqueror21 = (navigator.userAgent.indexOf("Konqueror 2.1") > -1 || navigator.userAgent.indexOf("Konqueror/2.1") > -1) ? 1 : 0;
Konqueror22 = (navigator.userAgent.indexOf("Konqueror 2.2") > -1 || navigator.userAgent.indexOf("Konqueror/2.2") > -1) ? 1 : 0;
Konqueror2 = Konqueror21 || Konqueror22;
Opera = (navigator.userAgent.indexOf("Opera") > -1) ? 1 : 0;
Opera5 = (navigator.userAgent.indexOf("Opera 5") > -1 || navigator.userAgent.indexOf("Opera/5") > -1) ? 1 : 0;
Opera6 = (navigator.userAgent.indexOf("Opera 6") > -1 || navigator.userAgent.indexOf("Opera/6") > -1) ? 1 : 0;
Opera56 = Opera5 || Opera6;
IE = (document.all) ? 1 : 0;
IE4 = IE && !DOM;

function setVisibility(layer,on) {
	if (on) {
		if (DOM) {
			document.getElementById(layer).style.visibility = "visible";
		} else if (NS4) {
			document.layers[layer].visibility = "show";
		} else {
			document.all[layer].style.visibility = "visible";
		}
	} else {
		if (DOM) {
			document.getElementById(layer).style.visibility = "hidden";
		} else if (NS4) {
			document.layers[layer].visibility = "hide";
		} else {
			document.all[layer].style.visibility = "hidden";
		}
	}
}

function isVisible(layer) {
	if (DOM) {
		return (document.getElementById(layer).style.visibility == "visible");
	} else if (NS4) {
		return (document.layers[layer].visibility == "show");
	} else {
		return (document.all[layer].style.visibility == "visible");
	}
}

function setLeft(layer,x) {
	if (DOM && !Opera5) {
		document.getElementById(layer).style.left = x + "px";
	} else if (Opera5) {
		document.getElementById(layer).style.left = x;
	} else if (NS4) {
		document.layers[layer].left = x;
	} else {
		document.all[layer].style.pixelLeft = x;
	}
}

function getOffsetLeft(layer) {
	var value = 0;
	if (DOM) {	// Mozilla, Konqueror >= 2.2, Opera >= 5, IE
			// timing problems with Konqueror 2.1 ?
		object = document.getElementById(layer);
		value = object.offsetLeft;
		return (value);
//alert (object.tagName + " --- " + object.offsetLeft);
		while (object.tagName != "BODY" && object.offsetParent) {
			object = object.offsetParent;
//alert (object.tagName + " --- " + object.offsetLeft);
			value += object.offsetLeft;
		}
	} else if (NS4) {
		value = document.layers[layer].pageX;
	} else {	// IE4 IS SIMPLY A BASTARD !!!
		if (document.all["IE4" + layer]) {
			layer = "IE4" + layer;
		}
		object = document.all[layer];
		value = object.offsetLeft;
		while (object.tagName != "BODY") {
			object = object.offsetParent;
			value += object.offsetLeft;
		}
	}
	return (value);
}

function setTop(layer,y) {
	if (DOM && !Opera5) {
		document.getElementById(layer).style.top = y + "px";
	} else if (Opera5) {
		document.getElementById(layer).style.top = y;
	} else if (NS4) {
		document.layers[layer].top = y;
	} else {
		document.all[layer].style.pixelTop = y;
	}
}

function getOffsetTop(layer) {
// IE 5.5 and 6.0 behaviour with this function is really strange:
// in some cases, they return a really too large value...
// ... after all, IE is buggy, nothing new
	var value = 0;
	if (DOM) {
		object = document.getElementById(layer);
		value = object.offsetTop;
		while (object.tagName != "BODY" && object.offsetParent) {
			object = object.offsetParent;
			value += object.offsetTop;
			return (value);
		}
	} else if (NS4) {
		value = document.layers[layer].pageY;
	} else {	// IE4 IS SIMPLY A BASTARD !!!
		if (document.all["IE4" + layer]) {
			layer = "IE4" + layer;
		}
		object = document.all[layer];
		value = object.offsetTop;
		while (object.tagName != "BODY") {
			object = object.offsetParent;
			value += object.offsetTop;
		}
	}
	return (value);
}

function setWidth(layer,w) {
	if (DOM) {
		document.getElementById(layer).style.width = w;
	} else if (NS4) {
//		document.layers[layer].width = w;
	} else {
		document.all[layer].style.pixelWidth = w;
	}
}

function getOffsetWidth(layer) {
	var value = 0;
	if (DOM && !Opera56) {
		value = document.getElementById(layer).offsetWidth;
		if (isNaN(value)) {
		// e.g. undefined on Konqueror 2.1
			if (abscissaStep) {	// this variable is set if this function is used with the PHP Layers Menu System
				value = abscissaStep;
			} else {
				value = 0;
			}
		}
	} else if (NS4) {
		value = document.layers[layer].document.width;
	} else if (Opera56) {
		value = document.getElementById(layer).style.pixelWidth;
	} else {	// IE4 IS SIMPLY A BASTARD !!!
		if (document.all["IE4" + layer]) {
			layer = "IE4" + layer;
		}
		value = document.all[layer].offsetWidth;
	}
	return (value);
}

function setHeight(layer,h) {	// unused, not tested
	if (DOM) {
		document.getElementById(layer).style.height = h;
	} else if (NS4) {
//		document.layers[layer].height = h;
	} else {
		document.all[layer].style.pixelHeight = h;
	}
}

function getOffsetHeight(layer) {
	var value = 0;
	if (DOM && !Opera56) {
		value = document.getElementById(layer).offsetHeight;
		if (isNaN(value)) {
		// e.g. undefined on Konqueror 2.1
			value = 25;
		}
	} else if (NS4) {
		value = document.layers[layer].document.height;
	} else if (Opera56) {
		value = document.getElementById(layer).style.pixelHeight;
	} else {	// IE4 IS SIMPLY A BASTARD !!!
		if (document.all["IE4" + layer]) {
			layer = "IE4" + layer;
		}
		value = document.all[layer].offsetHeight;
	}
	return (value);
}

function getWindowWidth() {
	var value = 0;
	if ((DOM && !IE) || NS4 || Konqueror || Opera) {
		value = top.innerWidth;
//	} else if (NS4) {
//		value = document.width;
	} else {	// IE
		if (document.documentElement && document.documentElement.clientWidth) {
			value = document.documentElement.clientWidth;
		} else if (document.body) {
			value = document.body.clientWidth;
		}
	}
	if (isNaN(value)) {
		value = top.innerWidth;
	}
	return (value);
}

function getWindowXOffset() {
	var value = 0;
	if ((DOM && !IE) || NS4 || Konqueror || Opera) {
		value = window.pageXOffset;
	} else {	// IE
		if (document.documentElement && document.documentElement.scrollLeft) {
			value = document.documentElement.scrollLeft;
		} else if (document.body) {
			value = document.body.scrollLeft;
		}
	}
	return (value);
}

function getWindowHeight() {
	var value = 0;
	if ((DOM && !IE) || NS4 || Konqueror || Opera) {
		value = top.innerHeight;
	} else {	// IE
		if (document.documentElement && document.documentElement.clientHeight) {
			value = document.documentElement.clientHeight;
		} else if (document.body) {
			value = document.body.clientHeight;
		}
	}
	if (isNaN(value)) {
		value = top.innerHeight;
	}
	return (value);
}

function getWindowYOffset() {
	var value = 0;
	if ((DOM && !IE) || NS4 || Konqueror || Opera) {
		value = window.pageYOffset;
	} else {	// IE
		if (document.documentElement && document.documentElement.scrollTop) {
			value = document.documentElement.scrollTop;
		} else if (document.body) {
			value = document.body.scrollTop;
		}
	}
	return (value);
}