// DHTMLapi.js custom API for cross-platform
// object positioning by Danny Goodman (http://www.dannyg.com).
// Release 2.0. Supports NN4, IE, and W3C DOMs.
  
// Global variables
var isCSS, isW3C, isIE4, isNN4, isIE6CSS;
// initialize upon load to let all browsers establish content objects
function initDHTMLAPI( ) {
    if (document.images) {
        isCSS = (document.body && document.body.style) ? true : false;
        isW3C = (isCSS && document.getElementById) ? true : false;
        isIE4 = (isCSS && document.all) ? true : false;
        isNN4 = (document.layers) ? true : false;
        isIE6CSS = (document.compatMode && document.compatMode.indexOf("CSS1") >= 0) ? true : false;
    }
}
// set event handler to initialize API
  
// Seek nested NN4 layer from string name
function seekLayer(doc, name) {

    var theObj;
    for (var i = 0; i < doc.layers.length; i++) {
        if (doc.layers[i].name == name) {
            theObj = doc.layers[i];
            break;
        }
        // dive into nested layers if necessary
        if (doc.layers[i].document.layers.length > 0) {
            theObj = seekLayer(document.layers[i].document, name);
        }
    }
    return theObj;
}
  
// Convert object name string or object reference
// into a valid element object reference
function getRawObject(obj) {
    var theObj;
    if (typeof obj == "string") {
        if (isW3C) {
            theObj = document.getElementById(obj);
        } else if (isIE4) {
            theObj = document.all(obj);
        } else if (isNN4) {
            theObj = seekLayer(document, obj);
        }
    } else {
        // pass through object reference
        theObj = obj;
    }
    return theObj;
}
  
// Convert object name string or object reference
// into a valid style (or NN4 layer) reference
function getObject(obj) {
    var theObj = getRawObject(obj);
    if (theObj && isCSS) {
        theObj = theObj.style;
    }
    return theObj;
}
  
// Position an object at a specific pixel coordinate
function shiftTo(obj, x, y) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isCSS) {
            // equalize incorrect numeric value type
            var units = (typeof theObj.left == "string") ? "px" : 0; 
            theObj.left = x + units;
            theObj.top = y + units;
        } else if (isNN4) {
            theObj.moveTo(x,y);
        } 
    } 
}
  
// Move an object by x and/or y pixels
function shiftBy(obj, deltaX, deltaY) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isCSS) {
            // equalize incorrect numeric value type
            var units = (typeof theObj.left == "string") ? "px" : 0; 
            theObj.left = getObjectLeft(obj) + deltaX + units;
            theObj.top = getObjectTop(obj) + deltaY + units;
        } else if (isNN4) {
            theObj.moveBy(deltaX, deltaY);
        }
    }
}

// Set the z-order of an object
function setZIndex(obj, zOrder) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.zIndex = zOrder;
    }
}
  
// Set the background color of an object
function setBGColor(obj, color) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isNN4) {
            theObj.bgColor = color;
        } else if (isCSS) {
            theObj.backgroundColor = color;
        }
    }
}
  
// Set the  color of an object
function setColor(obj, color) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isNN4) {
			// need to change this for nav4
            theObj.color = color;
        } else if (isCSS) {
            theObj.color = color;
        }
    }
}
// Set the text of an object
function setText(obj, txtMsg) {
    var theObj = getRawObject(obj);
    if (theObj) {
        if (isNN4) {
			// need to change this for nav4
            // theObj.color = color;
        } else if (isCSS) {
            theObj.innerHTML = txtMsg;
        }
    }
}

// Set the visibility of an object to visible
function show(obj) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "visible";
    }
}
  
// Set the visibility of an object to hidden
function hide(obj) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "hidden";
    }
}
  
// Retrieve the x coordinate of a positionable object
function getObjectLeft(obj)  {
	var elem = getRawObject(obj);
	var result = 0;
	if (elem.currentStyle) {
		result = elem.currentStyle.left;
	} else if (elem.style) {
		result = elem.style.left;
	} else if (isNN4) {
		result = elem.left;
	}
	return parseInt(result);
}
  
// Retrieve the y coordinate of a positionable object
function getObjectTop(obj)  {
	var elem = getRawObject(obj);
	var result = 0;
	if (!elem) {
		return result;
	}
	if (elem.currentStyle) {
		result = elem.currentStyle.top;
	} else if (elem.style) {
		result = elem.style.top;
	} else if (isNN4) {
		result = elem.top;
	}
	return parseInt(result);
}
  
// Retrieve the rendered width of an element
function getObjectWidth(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetWidth) {
	/*
        if (elem.scrollWidth && (elem.offsetWidth != elem.scrollWidth)) {
            result = elem.scrollWidth;
        } else {
            result = elem.offsetWidth;
        }
		*/
            result = elem.offsetWidth;
    } else if (elem.style && elem.style.pixelWidth) {
        result = elem.style.pixelWidth;
    } else if (elem.clip && elem.clip.width) {
        result = elem.clip.width;
    }
    return parseInt(result);
}

// Sets the rendered width of an element
function setObjectWidth(obj, intWidth)  {
    var elem = getRawObject(obj);
    if (elem.offsetWidth) {
        if (elem.scrollWidth && (elem.offsetWidth != elem.scrollWidth)) {
            elem.scrollWidth = intWidth;
        } else {
            elem.offsetWidth = intWidth;
        }
    } else if (elem.clip && elem.clip.width) {
        elem.clip.width = intWidth;
    } else if (elem.style && elem.style.pixelWidth) {
        elem.style.pixelWidth = intWidth;
    }
}
  
// Retrieve the rendered height of an element
function getObjectHeight(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
	if (!elem) {
		return result;
	}
    if (elem.offsetHeight) {
        result = elem.offsetHeight;
    } else if (elem.clip && elem.clip.height) {
        result = elem.clip.height;
    } else if (elem.style && elem.style.pixelHeight) {
        result = elem.style.pixelHeight;
    }
    return parseInt(result);
}
  
// Return the available content width space in browser window
function getInsideWindowWidth( ) {
    if (window.innerWidth) {
        return window.innerWidth;
    } else if (isIE6CSS) {
        // measure the html element's clientWidth
        return document.body.parentElement.clientWidth;
    } else if (document.body && document.body.clientWidth) {
        return document.body.clientWidth;
    }
    return 0;
}

// Return the available content height space in browser window
function getInsideWindowHeight( ) {
    if (window.innerHeight) {
        return window.innerHeight;
    } else if (isIE6CSS) {
        // measure the html element's clientHeight
        return document.body.parentElement.clientHeight;
    } else if (document.body && document.body.clientHeight) {
        return document.body.clientHeight;
    }
    return 0;
}

function setStatusBar(txtMsg) {
	window.status = txtMsg;
	return true;
}

function clearStatusBar() {
	window.status = window.defaultStatus;
	return true;
}

function decimal_to_hex(decimal_value) {
    var hex_array = new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F");
    var hex_index1 = Math.floor(decimal_value / 16);
    var hex_index2 = decimal_value % 16;
    var hex1 = hex_array[hex_index1];
    var hex2 = hex_array[hex_index2];
    return hex1 + hex2;
}