// DHTMLapi.js 
//
// $Id: DHTMLapi.js,v 1.11 2006-08-26 18:50:36 bergsma Exp $
//
// $Log: DHTMLapi.js,v $
// Revision 1.11  2006-08-26 18:50:36  bergsma
// no message
//
// Revision 1.10  2005/12/26 14:52:29  bergsma
// no message
//
// Revision 1.9  2005/12/23 15:22:51  bergsma
// no message
//
// Revision 1.7  2005/12/16 00:17:51  bergsma
// *** empty log message ***
//
// Revision 1.6  2005/11/22 16:57:25  bergsma
// *** empty log message ***
//
//

// Global variables
var isCSS, isW3C, isIE4, 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;
  }

  initialize() ;
}

// set event handler to initialize API
// If the onload attribute exists in the HTML document on
// the BODY tag, then the following statement is overridden
// by that. 
window.onload = initDHTMLAPI;


var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


// 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;
}


function getEventTarget(e) {

 	var targ;
	var lEvt;
	if (!e ) {
	  e = window.event;
	}
	if ( e.target ) {
	  targ = e.target;
	}
    	else if ( e.srcElement ) {
	  targ = e.srcElement;
  	}
	if ( targ.nodeType == 3 ) {
	  targ = targ.parentNode; // defeat Safari bug
	}
  	return targ;  
}


// 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 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";
    }
}


function hideElement(pNd){
    var node = getRawObject(pNd);
    if (node) {node.style.display = "none"};
  return node;
}

function showElement(pNd){
    var node = getRawObject(pNd);
    if (node) {node.style.display = ""};
  return node;
}


function findPosX(obj){
 obj = getRawObject(obj);
   var leftOff = 0;
   var curleft = 0;
   if (obj.x) {
     return obj.x;
   } else if (obj.offsetParent) {
     while (obj.offsetParent){
       if ( obj.style.left )  {
          curleft += parseInt(obj.style.left.substring(0,obj.style.left.length-2));
          return curleft;
       }else {
          curleft += obj.offsetLeft
       }
       obj = obj.offsetParent;
     }
   } 
   return curleft;
}

function findPosY(obj){

   obj = getRawObject(obj);
   var curtop = 0;

   if (obj.y){
     return obj.y;
   } else if (obj.offsetParent) {
     while (obj.offsetParent){
       if ( obj.style.top )  {
          curtop += parseInt(obj.style.top.substring(0,obj.style.top.length-2));
          return curtop;
       }else {
          curtop += obj.offsetTop
       }
       obj = obj.offsetParent;
     }
   }
   return curtop;
}


// Retrieve the x coordinate of a positionable object
function getObjectLeft(obj)  {
    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)  {
    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)  {
    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);
}

// Retrieve the rendered height of an element
function getObjectHeight(obj)  {
    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);
}


// 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 inspect(elm){
  var str = "";
  for (var i in elm) {
    str += i + ": " + elm.getAttribute(i) + "\n";
  }
  alert(str);
}

var isDOM_HS = 0 ;
var isAJAX_HS = 0 ;

function initialize() 
{
  var dashboard = getRawObject('dashboard') ;
  var vt_ajax   = getRawObject('vt_ajax') ;

  if ( vt_ajax ) {

    // VT AJAX interface.
    isAJAX_HS = 1 ;

    initAjaxVT() ;

  }

  else if ( dashboard ) {

    // DOM-HS interface
    isDOM_HS = 1 ;

    vt_table  = getRawObject('vt_table') ;

    if ( vt_table ) {

      initDomHsVT() ;

    }
    else {

      // Regular DOM-HS
    }

  }
}