// DHTMLapi.js custom API for cross-platform
// object positioning by Danny Goodman
// Release 2.0. Supports NN4, IE, and W3C DOMs.

// Global variables
var isCSS;
var isW3C;
var isIE4;
var isNN4;
// 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
//window.onload = initDHTMLAPI;

// Seek nested NN4 layer from string name
function seekLayer(doc, name) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var theObj = getObject(obj);
    if (theObj) {
        theObj.zIndex = zOrder;
    }
}

// Set the background color of an object
function setBGColor(obj, color) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var theObj = getObject(obj);
    if (theObj) {
        if (isNN4) {
            theObj.bgColor = color;
        } else if (isCSS) {
            theObj.backgroundColor = color;
        }
    }
}

// Set the visibility of an object to visible
function show(obj) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "visible";
    }
}

// Set the visibility of an object to hidden
function hide(obj) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "hidden";
    }
}

// Retrieve the x coordinate of a positionable object
function getObjectLeft(obj)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    if (document.defaultView) {
        var style = document.defaultView;
        var cssDecl = style.getComputedStyle(elem, "");
        result = cssDecl.getPropertyValue("left");
    } else 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)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    if (document.defaultView) {
        var style = document.defaultView;
        var cssDecl = style.getComputedStyle(elem, "");
        result = cssDecl.getPropertyValue("top");
    } else 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)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetWidth) {
        result = elem.offsetWidth;
    } else if (elem.clip && elem.clip.width) {
        result = elem.clip.width;
    } else if (elem.style && elem.style.pixelWidth) {
        result = elem.style.pixelWidth;
    }
    return parseInt(result);
}

// Set the rendered width of an element
function setObjectWidth(obj,val)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetWidth) {
        elem.offsetWidth = val;
    } else if (elem.clip && elem.clip.width) {
        elem.clip.width = val;
    } else if (elem.style && elem.style.pixelWidth) {
        elem.style.pixelWidth = val;
    }
}

// Retrieve the rendered height of an element
function getObjectHeight(obj)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    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);
}

// Set the rendered height of an element
function setObjectHeight(obj,val)  {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetHeight) {
		elem.offsetHeight = val;
    } else if (elem.clip && elem.clip.height) {
        elem.clip.height = val;
    } else if (elem.style && elem.style.pixelHeight) {
        elem.style.pixelHeight = val;
    }
}

// Return the available content width space in browser window
function getInsideWindowWidth() {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
    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 centerOnWindow(elemID) {
	if( typeof(isCSS) == "undefined" )
	{
		initDHTMLAPI();
	}
	// 'obj' is the positionable object
	var obj = getRawObject(elemID);
	// window scroll factors
	var scrollX = 0, scrollY = 0;
	if (document.body && typeof document.body.scrollTop != "undefined") {
		scrollX += document.body.scrollLeft;
		scrollY += document.body.scrollTop;
		if (document.body.parentNode && 
		typeof document.body.parentNode.scrollTop != "undefined") {
		scrollX += document.body.parentNode.scrollLeft;
		scrollY += document.body.parentNode.scrollTop;
		}
	} else if (typeof window.pageXOffset != "undefined") {
		scrollX += window.pageXOffset;
		scrollY += window.pageYOffset;
	}
	var x = Math.round((getInsideWindowWidth( )/2) - (getObjectWidth(obj)/2)) + scrollX;
	// !!!:tingham:20050527 Removed height compensation. Putting window at
	// exactly middle of window for top instead of middle-half object height (getObjectHeight(obj)/2))
	var y = Math.round((getInsideWindowHeight( )/2)-(getObjectWidth(obj)/2)) + scrollY;
	shiftTo(obj, x, y);
	show(obj);
}

function setToScrollTopAndCenter(elemID) {
	try
	{
		if( typeof(isCSS) == "undefined" )
		{
			initDHTMLAPI();
		}
		// 'obj' is the positionable object
		var obj = getRawObject(elemID);
		// window scroll factors
		var scrollX = 0, scrollY = 0;
		if (document.body && typeof document.body.scrollTop != "undefined") {
			scrollX += document.body.scrollLeft;
			scrollY += document.body.scrollTop;
			if (document.body.parentNode && 
			typeof document.body.parentNode.scrollTop != "undefined") {
			scrollX += document.body.parentNode.scrollLeft;
			scrollY += document.body.parentNode.scrollTop;
			}
		} else if (typeof window.pageXOffset != "undefined") {
			scrollX += window.pageXOffset;
			scrollY += window.pageYOffset;
		}
		var x = Math.round((getInsideWindowWidth( )/2) - (getObjectWidth(obj)/2)) + scrollX;
		// !!!:tingham:20050527 Removed height compensation. Putting window at
		// exactly middle of window for top instead of middle-half object height (getObjectHeight(obj)/2))
		var y = scrollY+10;
		shiftTo(obj, x, y);
		show(obj);
	}
	catch(e)
	{
	
	}
}

function Get_Cookie(name) {
   var start = document.cookie.indexOf(name+"=");
   var len = start+name.length+1;
   if ((!start) && (name != document.cookie.substring(0,name.length))) return null;
   if (start == -1) return null;
   var end = document.cookie.indexOf(";",len);
   if (end == -1) end = document.cookie.length;
   return unescape(document.cookie.substring(len,end));
}

function Set_Cookie(name,value,expires,path,domain,secure) {
	expires = expires * 60*60*24*1000;
	var today = new Date();
	var expires_date = new Date( today.getTime() + (expires) );
	var cookieString = name + "=" +escape(value) +
	   ( (expires) ? ";expires=" + expires_date.toGMTString() : "") +
	   ( (path) ? ";path=" + path : "") +
	   ( (domain) ? ";domain=" + domain : "") +
	   ( (secure) ? ";secure" : "");
	document.cookie = cookieString;
}