/* Copyright  (c) 2006 Yahoo! Inc. All rights reserved. */
YAHOO.util.Dom = new function() {
	this.get = function(el) {
		if (typeof el == "string") {
			el = document.getElementById(el);
		}
		return el;
	};
	this.getStyle = function(el, property) {
		var val=null, dv=document.defaultView;
		el = this.get(el);
		if (property == "opacity" && el.filters) {
			val = 1;
			try { val = el.filters.item("DXImageTransform.Microsoft.Alpha").opacity / 100; }
			catch (e) {
				try { val = el.filters.item("alpha").opacity / 100; }
				catch (e) { }
			}
		}
		else if (el.style[property]) { val = el.style[property]; }
		else if (el.currentStyle && el.currentStyle[property]) { val = el.currentStyle[property]; }
		else if (dv && dv.getComputedStyle) {
			var converted = "";
			for (var i=0, len=property.length; i < len; ++i) {
				if (property.charAt(i) == property.charAt(i).toUpperCase()) {
					converted = converted + "-" + property.charAt(i).toLowerCase();
				}
				else { converted = converted + property.charAt(i); }
			}
			if (dv.getComputedStyle(el, "").getPropertyValue(converted)) {
				val = dv.getComputedStyle(el, "").getPropertyValue(converted);
			}
		}
		// Convert any and all RGB colors to HEX colors
		var m, re=/rgb\([0-9, ]{5,}\)/;
		while (re.test(val)) {
			m = re.exec(val);
			if (m.indexOf(/\//g) == -1) {
				for (var i=0; i < m.length; i++) {
					val = val.replace(re, "#" + this.rgb2hex(m[i]));
				}
			}
		}
		return val;
	};
	this.setStyle = function(el, property, val) {
		el = this.get(el);
		switch (property) {
			case "opacity":
				if (el.filters) {
					el.style.filter = "alpha(opacity=" + (val * 100) + ")";
					if (!el.currentStyle.hasLayout) { el.style.zoom = 1; }
				}
				else {
					el.style.opacity = val;
					el.style["-moz-opacity"] = val;
					el.style["-khtml-opacity"] = val;
				}
				break;
			default:
				el.style[property] = val;
		}
	};
	this.rgb2hex = function (r, g, b) {
		if (typeof(r) != "number") {
			var rgb = r.replace(/[rgb() ]/g, "");
			rgb = rgb.split(",");
			return this.toHex(rgb[0]) + this.toHex(rgb[1]) + this.toHex(rgb[2]);
		}
		return this.toHex(r) + this.toHex(g) + this.toHex(b);
	};
	this.hexchars = "0123456789ABCDEF";
	this.toHex = function(n) {
		n = n || 0;
		n = parseInt(n, 10);
		if (isNaN(n)) { n = 0; }
		n = Math.round(Math.min(Math.max(0, n), 255));
		return "" + this.hexchars.charAt((n - n % 16) / 16) + this.hexchars.charAt(n % 16);
	};
	this.getXY = function(el) {
		el = this.get(el);
		if (el.parentNode === null || this.getStyle(el,"display") == "none") { return false; }
		var parent = null;
		var pos = [];
		var box;
		if (el.getBoundingClientRect) {
			box = el.getBoundingClientRect();
			var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
			var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
			return [box.left + scrollLeft, box.top + scrollTop];
		}
		else if (document.getBoxObjectFor) {
			box = document.getBoxObjectFor(el);
			pos = [box.x, box.y];
		}
		else {
			pos = [el.offsetLeft, el.offsetTop];
			parent = el.offsetParent;
			if (parent != el) {
				while (parent) {
					pos[0] += parent.offsetLeft;
					pos[1] += parent.offsetTop;
					parent = parent.offsetParent;
				}
			}
			var ua = navigator.userAgent.toLowerCase();
			if (ua.indexOf("opera") != -1 || (ua.indexOf("safari") != -1 &&
			 this.getStyle(el, "position") == "absolute")) {
				pos[1] -= document.body.offsetTop;
			}
		}
		if (el.parentNode) { parent = el.parentNode; }
		else { parent = null; }
		while (parent && parent.tagName != "BODY" && parent.tagName != "HTML") {
			pos[0] -= parent.scrollLeft;
			pos[1] -= parent.scrollTop;
			if (parent.parentNode) { parent = parent.parentNode; }
			else { parent = null; }
		}
		return pos;
	};
	this.getX = function(el) { return this.getXY(el)[0]; };
	this.getY = function(el) { return this.getXY(el)[1]; };
	this.setXY = function(el, pos, noRetry) {
		el = this.get(el);
		var pageXY = YAHOO.util.Dom.getXY(el);
		if (pageXY === false) { return false; }
		var delta = [parseInt(YAHOO.util.Dom.getStyle(el, "left"), 10),
		 parseInt(YAHOO.util.Dom.getStyle(el, "top"), 10)];
		if (isNaN(delta[0])) { delta[0] = 0; }
		if (isNaN(delta[1])) { delta[1] = 0; }
		if (pos[0] !== null) {
			el.style.left = pos[0] - pageXY[0] + delta[0] + "px";
		}
		if (pos[1] !== null) {
			el.style.top = pos[1] - pageXY[1] + delta[1] + "px";
		}
		var newXY = this.getXY(el);
		if (!noRetry && (newXY[0] != pos[0] || newXY[1] != pos[1])) {
			this.setXY(el, pos, true);
		}
		return true;
	};
	this.setX = function(el, x) { return this.setXY(el,[x,null]); };
	this.setY = function(el, y) { return this.setXY(el, [null, y]); };
	this.getRegion = function(el) {
		el = this.get(el);
		return new YAHOO.util.Region.getRegion(el);
	};
	this.getClientWidth = function() {
		return (document.documentElement.offsetWidth || document.body.offsetWidth);
	};
	this.getClientHeight = function() {
		return (self.innerHeight || document.documentElement.clientHeight ||
		 document.body.clientHeight);
	};
};
YAHOO.util.Region = function(t, r, b, l) {
	this.top = t;
	this.right = r;
	this.bottom = b;
	this.left = l;
};
YAHOO.util.Region.prototype.contains = function(region) {
	return (region.left >= this.left && region.right <= this.right &&
	 region.top >= this.top && region.bottom <= this.bottom);
};
YAHOO.util.Region.prototype.getArea = function() {
	return ((this.bottom - this.top) * (this.right - this.left));
};
YAHOO.util.Region.prototype.intersect = function(region) {
	var t = Math.max(this.top, region.top);
	var r = Math.min(this.right, region.right);
	var b = Math.min(this.bottom, region.bottom);
	var l = Math.max(this.left, region.left);
	if (b >= t && r >= l) { return new YAHOO.util.Region(t, r, b, l); }
	else { return null; }
};
YAHOO.util.Region.prototype.union = function(region) {
	var t = Math.min(this.top, region.top);
	var r = Math.max(this.right, region.right);
	var b = Math.max(this.bottom, region.bottom);
	var l = Math.min(this.left, region.left);
	return new YAHOO.util.Region(t, r, b, l);
};
YAHOO.util.Region.prototype.toString = function() {
	return ("Region  {" + "  t: " + this.top + ", r: " + this.right +
	 ", b: " + this.bottom + ", l: " + this.left + "}");
}
YAHOO.util.Region.getRegion = function(el) {
	var p = YAHOO.util.Dom.getXY(el);
	var t = p[1];
	var r = p[0] + el.offsetWidth;
	var b = p[1] + el.offsetHeight;
	var l = p[0];
	return new YAHOO.util.Region(t, r, b, l);
};
YAHOO.util.Point = function(x, y) {
	this.x = x;
	this.y = y;
	this.top = y;
	this.right = x;
	this.bottom = y;
	this.left = x;
};
YAHOO.util.Point.prototype = new YAHOO.util.Region();