/**********************************************
 LMAnimate.js
 Advances ActiveCampus JavaScript functions for
    DHTML animation tasks, including positioning, dimensions, and visibility.
 Author:  M. Dempster 8/20/02
 Copyright:  LiquidMatrix Corp.
**********************************************/
/**********************************************
 createReference(stringexp)    
 stringexp:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  A reference to an object style.
 Description:   Creates a string reference to the style of an HTML element on the page.  Since each browser does Obj 
 				referencing differently, we have to branch it.
**********************************************/ 
function createReference(Element) {
	if (isDOM && !isIE) {
		oRef = eval("document.getElementById('" + Element + "').style")
	} else if (isNav) {
		oRef = eval("document.layers['" + Element + "']")
	} else {
		oRef = eval("document.all." + Element + ".style")
	}
	return oRef
}

/**********************************************
 setElementVisibility(stringexp1, stringexp2)    
 stringexp 1 and 2:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  none
 Description:  Sets the Visibility property (given in Stringexp2) for the element ID specifiec in Stringexp1.  This can be set to either
 				visible or hidden.
**********************************************/ 
function setElementVisibility(Element, state) {
	oElement = createReference(Element)
	if (isNav) { state = state.toUpperCase() == "VISIBLE" ? "show":"hide" }		//Because NAV4 does visibility states differently, swap to corresponding word.
	oElement.visibility = state.toLowerCase(); 
}

/**********************************************
 getElementVisibility(stringexp)    
 stringexp:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  none
 Description:  Gets the Visibility property for the element ID specifiec in Stringexp. 
**********************************************/ 
function getElementVisibility(Element, state) {
	oElement = createReference(Element)
	elementVis = oElement.visibility;
	return elementVis
}

/**********************************************
 setElementDisplay(stringexp1, stringexp2)    
 stringexp 1 and 2:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  none
 Description:  Sets the Display property (given in Stringexp2) for the element ID specifiec in Stringexp1.  This can be set to any valid 
 				display style (e.g. Block, inline, none)
**********************************************/ 
function setElementDisplay(Element, state) {
	oElement = createReference(Element)
    if (!isNav) { oElement.display = state.toLowerCase(); }		//This function does not work in NAV4!
}


/**********************************************
 getElementDisplay(stringexp1)    
 stringexp:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  none
 Description:  Gets the Display property for the element ID specifiec in Stringexp.  
**********************************************/ 
function getElementDisplay(Element, state) {
	oElement = createReference(Element)
    if (!isNav) { elementDisp = oElement.display }		//This function does not work in NAV4!
	return elementDisp
}


/**********************************************
 setElementPosition(stringexp1, integer1, integer2)    
 stringexp  
 	use:  Required
	Datatype:  String
	A valid string expression
 integer 1 and 2  
 	use:  Required
	Datatype:  Integer
	A valid integer
 Description:   This function moves the element in Stringexp to the coordinates specified by ints 1 and 2.  You must specify both X and Y coords.
**********************************************/ 
function setElementPosition(Element, elX, elY) {
	oElement = createReference(Element)
    if (isIE) {  												
		oElement.pixelTop = elY
		oElement.pixelLeft = elX
	} else {
        oElement.left = elX
		oElement.top = elY
	}
}


/**********************************************
 getElementPosition(stringexp1, stringexp2)    
 stringexp 1 and 2:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  Integer
 Description:   This function retrieves the coordinate (stringexp2) for the element ID specified in Stringexp1.  Stringexp2 must be set to left or top.
**********************************************/ 
function getElementPosition(Element, side) {
	oElement = createReference(Element)
    if (isIE) {  												//String manip:  Make sure side is Left or Top...IE doesn't understand all lower case.
		elementPos = eval('oElement.pixel' + (side.toUpperCase()).substring(0,1) + (side.toLowerCase()).substring(1,side.length))	
	} else if (isDOM) {
        elementPos = parseInt(eval('oElement.' + side.toLowerCase()))
    } else {
		elementPos = eval('oElement.' + side.toLowerCase())
	}
    return elementPos
}

/**********************************************
 getElementDimension(stringexp1, stringexp2)    
 stringexp 1 and 2:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  Integer
 Description:   This function retrieves the dimension (stringexp2) for the element ID specified in Stringexp1.  Stringexp2 must be set to width or height.
**********************************************/ 
function getElementDimension(Element, dim) {
    oElement = createReference(Element)
    if (isIE) {												//String manip:  Make sure side is Left or Top...IE doesn't understand all lower case.
		elementDim = eval('oElement.pixel' + (dim.toUpperCase()).substring(0,1) + (dim.toLowerCase()).substring(1,dim.length))
	} else if (isDOM) {
        elementDim = parseInt(eval('oElement.' + dim.toLowerCase()))
    } else {
		elementDim = eval('oElement.document.' + dim.toLowerCase())
	}
    return elementDim
}

/**********************************************
 getElementUNPOSDimension(stringexp1, stringexp2)    
 stringexp 1 and 2:  
 	use:  Required
	Datatype:  String
	A valid string expression
 Return:  Integer
 Description:   This function retrieves the dimension (stringexp2) for the UNDIMENSIONED element ID specified in Stringexp1.  Stringexp2 must be set to width or height.
**********************************************/ 
function getElementUNPOSDimension(Element, dim) {
    
	oElement = createReference(Element)
    if (isIE) {	
		if (dim == "width") {
			dim = "scrollWidth"
		} else {
			dim = "scrollHeight"
		}						
		elementDim = eval('document.all.' + Element + '.' + dim);
	} else if (isDOM) {
		if (dim == "width") {
			dim = "offsetWidth"
		} else {
			dim = "offsetHeight"
		}	
		elementDim = eval('document.getElementById("' + Element + '").' + dim);	
    } else {
		elementDim = eval('oElement.document.' + dim.toLowerCase())
	}
    return elementDim
}

/**********************************************
 setElementClass([stringexp, str2])    
 Return:  Nothing
 Description:   Replaces style class of element found at reference stringexp with specified class str2.  Class may
 				may be specified in page, or in external stylesheet, but a class name MUST be used.
 Tips:  You may use any number of argument pairs to swap multiple classes at the same time.  Arguments MUST be 
  		paired;  args not paired will result in an error.
**********************************************/ 
function setElementClass() {
    for (var i=0; i<setElementClass.arguments.length; i+=2) {
		if (isIE) { 
			eval('document.all.' + setElementClass.arguments[i] + '.className = "' + setElementClass.arguments[i+1] + '"'); 
		} else if (isDOM) {
			eval('document.getElementById(\'' + setElementClass.arguments[i] + '\').className = "' + setElementClass.arguments[i+1] + '"'); 
		}
	}
}