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diff --git a/includes/js/dojox/fx/_core.js b/includes/js/dojox/fx/_core.js
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+if(!dojo._hasResource["dojox.fx._core"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.fx._core"] = true;
+dojo.provide("dojox.fx._core");
+
+dojox.fx._Line = function(start, end){
+	// summary: a custom _Line to accomodate multi-dimensional values
+	//	
+	// description: 
+	//	a normal dojo._Line is the curve, and does Line(start,end)
+	//	for propertyAnimation. as we make more complicatied animations, we realize
+	//	some properties can have 2, or 4 values relevant (x,y) or (t,l,r,b) for example 
+	//
+	// 	this function provides support for those Lines, and is ported directly from 0.4
+	//	this is a lot of extra code for something so seldom used, so we'll put it here as
+	//	and optional core addition. you can create a new line, and use it during onAnimate
+	//	as you see fit.
+	//
+	// start: Integer|Array
+	//	An Integer (or an Array of integers) to use as a starting point
+	// end: Integer|Array
+	//	An Integer (or an Array of integers) to use as an ending point
+	//
+	// example: see dojox.fx.smoothScroll 
+	//
+	// example: 
+	// |	// this is 10 .. 100 and 50 .. 500
+	// |	var curve = new dojox.fx._Line([10,50],[100,500]);
+	// |	// dojo._Animation.onAnimate is called at every step of the animation
+	// |	// to define current values. this _Line returns an array
+	// | 	// at each step. arguments[0] and [1] in this example. 
+	//
+	this.start = start;
+	this.end = end;
+	if(dojo.isArray(start)){
+		// multi-dimensional branch
+		var diff = [];
+		dojo.forEach(this.start, function(s,i){
+			diff[i] = this.end[i] - s;
+		}, this);
+		
+		this.getValue = function(/*float*/ n){
+			var res = [];
+			dojo.forEach(this.start, function(s, i){
+				res[i] = (diff[i] * n) + s;
+			}, this);
+			return res; // Array
+		}
+	}else{
+		// single value branch, document here for both branches:
+		var diff = end - start;
+		this.getValue = function(/*float*/ n){
+			// summary: Returns the point on the line, or an array of points
+			// n: a floating point number greater than 0 and less than 1
+			// returns: Mixed 
+			return (diff * n) + this.start; // Decimal
+		}
+	}
+};
+
+}