// JavaScript Document
//*****************************************************************************
// Do not remove this notice.
//
// Copyright 2001 by Mike Hall.
// See http://www.brainjar.com for terms of use.
//*****************************************************************************

// Determine browser and version.

var mia;

function drag_initArray(){
	
		mia= new Array();
		switch(zoomInterval){
			case 4:
  		 		mia[0]=13;
		 		mia[1]=65;
		 		mia[2]=110;
		 		mia[3]=155;
		 		mia[4]=201;
		 		break;    
			case 5:
  		 		mia[0]=13;
		 		mia[1]=56;
		 		mia[2]=92;
		 		mia[3]=128;
		 		mia[4]=164;
		 		mia[5]=201;
  		 		break;
			case 6:
  		 		mia[0]=13;
		 		mia[1]=50;
		 		mia[2]=80;
		 		mia[3]=110;
		 		mia[4]=140;
				mia[5]=170;
				mia[6]=201;
   		 		break;
			case 7:
  				mia[0]=13;
		 		mia[1]=45;
				mia[2]=71;
		 		mia[3]=96;
		 		mia[4]=122;
		 		mia[5]=148;
		 		mia[6]=172;
		 		mia[7]=201;
  		 		break;
		}
} 

function drag_moveTo(pos){
	document.getElementById('zpan').style.top=mia[pos] -10 + "px";
	map.setZoom(zoomMin + pos);
}

function drag_clickOnPanel(px){
	var px= px.clientY -110;
	if (px < mia[0]){ drag_moveTo(0); return 0;}
	if (px > mia[mia.length]){drag_moveTo(mia.length); return 0;}
	for(var i=0; i<= mia.length-1; i++){
		if (px==mia[i]){drag_moveTo(i);return 0;}
		if (px >mia[i] && px < mia[i+1]){
			if (px > ((mia[i+1] - mia[i])/2) + (mia[i])){
				drag_moveTo(i+1);
				//alert("3");
				return 0;
			}else{
				drag_moveTo(i);
				//alert("4")
				return 0;
			}
		}
	}
}

function drag_checkPos(px){
if (px!="" || px != "px"){
	px = parseInt(px.replace("px", "")) +10; 
	//alert(zoomInterval.toString());
	//alert(px.toString());
	for(var i=0; i<= mia.length; i++){
		if (px==mia[i]){document.getElementById('zpan').style.top= (mia[i] - 10) + "px";drag_check(mia[i]);return 0;}
		if (i+1 <= mia.length){
			if (px > mia[i] && px < mia[i+1]){
				if (px > ((mia[i+1] - mia[i])/2) + (mia[i])){
					//alert(i + " - " + (i+1));
					document.getElementById('zpan').style.top= (mia[i+1] - 10) + "px";
					drag_check(mia[i+1]);
					return 0;
				}else{
					document.getElementById('zpan').style.top= (mia[i] - 10) + "px";
					drag_check(mia[i]);
					return 0;
				}
			}
		}
	}
}

}

function drag_check(px){
	//alert(px);
	for (var i=0; i <= mia.length; i++){
		if (px == mia[i]){
			map.setZoom(zoomMin + i);
			return 0;
		}
	}
}

function drag_Browser() {

  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var drag_browser = new drag_Browser();

// Global object to hold drag information.

var drag_dragObj = new Object();
drag_dragObj.zIndex = 0;

function drag_dragStart(event, id) {
  
  
  var el;
  var x, y;

  // If an element id was given, find it. Otherwise use the element being
  // clicked on.

  if (id)
    drag_dragObj.elNode = document.getElementById(id);
  else {
    if (drag_browser.isIE)
      drag_dragObj.elNode = window.event.srcElement;
    if (drag_browser.isNS)
      drag_dragObj.elNode = event.target;

    // If this is a text node, use its parent element.

    if (drag_dragObj.elNode.nodeType == 3)
      drag_dragObj.elNode = drag_dragObj.elNode.parentNode;
  }

  // Get cursor position with respect to the page.

  if (drag_browser.isIE) {
    //x = window.event.clientX + document.documentElement.scrollLeft
    //  + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (drag_browser.isNS) {
    //x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  // Save starting positions of cursor and element.

  drag_dragObj.cursorStartX = x;
  drag_dragObj.cursorStartY = y;
  drag_dragObj.elStartLeft  = parseInt(drag_dragObj.elNode.style.left, 10);
  drag_dragObj.elStartTop   = parseInt(drag_dragObj.elNode.style.top,  10);

  if (isNaN(drag_dragObj.elStartLeft)) drag_dragObj.elStartLeft = 0;
  if (isNaN(drag_dragObj.elStartTop))  drag_dragObj.elStartTop  = 0;

  // Update element's z-index.

  drag_dragObj.elNode.style.zIndex = ++drag_dragObj.zIndex;

  // Capture mousemove and mouseup events on the page.

  if (drag_browser.isIE) {
    document.attachEvent("onmousemove", drag_dragGo);
    document.attachEvent("onmouseup",	drag_dragStop);
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (drag_browser.isNS) {
    document.addEventListener("mousemove", drag_dragGo,   true);
    document.addEventListener("mouseup",   drag_dragStop, true);
    event.preventDefault();
  }
}

function drag_dragGo(event) {

  var x, y;

  // Get cursor position with respect to the page.

  if (drag_browser.isIE) {
    //x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }

  if (drag_browser.isNS) {
    //x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  if (drag_dragObj.elStartTop  + y - drag_dragObj.cursorStartY > 192){
  	drag_dragObj.elNode.style.top  = "192px";
  }else if(drag_dragObj.elStartTop  + y - drag_dragObj.cursorStartY < 3){
  	drag_dragObj.elNode.style.top  = "3px";
  }else{
  	// Move drag element by the same amount the cursor has moved.
  	//dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  	drag_dragObj.elNode.style.top  = (drag_dragObj.elStartTop  + y - drag_dragObj.cursorStartY) + "px";
  }
  
  if (drag_browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }

  if (drag_browser.isNS){event.preventDefault();}
}

function drag_dragStop(event) {

  // Stop capturing mousemove and mouseup events.

  if (drag_browser.isIE) {
    document.detachEvent("onmousemove", drag_dragGo);
    document.detachEvent("onmouseup",	drag_dragStop);
  }
  if (drag_browser.isNS) {
    document.removeEventListener("mousemove", drag_dragGo,	true);
    document.removeEventListener("mouseup",   drag_dragStop, true);
  }
  
}