function 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 browser = new Browser();

// Global object to hold drag information.

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

function 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)
    dragObj.elNode = document.getElementById(id);
  else {
    if (browser.isIE)
      dragObj.elNode = window.event.srcElement;
    if (browser.isNS)
      dragObj.elNode = event.target;

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

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

  // Get cursor position with respect to the page.

  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }
  
  // Save starting positions of cursor and element.

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

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

  // Update element's z-index.

  dragObj.elNode.style.zIndex = ++dragObj.zIndex;

  // Capture mousemove and mouseup events on the page.

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

function dragGo(event) {

  var x, y;

  // Get cursor position with respect to the page.

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

  // Move drag element by the same amount the cursor has moved.

  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";

  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
}

function dragStop(event) {

  // Stop capturing mousemove and mouseup events.

  if (browser.isIE) {
    document.detachEvent("onmousemove", dragGo);
    document.detachEvent("onmouseup",	dragStop);
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", dragGo,	true);
    document.removeEventListener("mouseup",   dragStop, true);
  }
}



var PopDiv = function(nameObj){
	this.content = "";
	this.nameObj = nameObj;
	this.idDiv = "popDiv"+this.nameObj;
	this.width = 529;
	this.height = 433;
	this.showHeader = false;
	this.bgColor = "";
	this.left = "";
	this.top = "";

}


PopDiv.prototype.write = function(){
	if(this.left == "") this.left = (window.screen.width - this.width)/2;
	if(this.top == "") this.top = (window.screen.height - this.height)/2 - 200;
	backColor = (this.bgColor != "") ? "bgcolor='"+this.bgColor+"'" : ""; 
	html = "<div id='"+this.idDiv+"' style='z-index:1px;position:absolute;top:"+this.top+";left:"+this.left+"' "+
		">"+
	       "		<table border='0' cellspacing=0 width='"+this.width+"'> ";
	if(this.showHeader){
		html += "			<tr bgcolor='#3C7A9F'> "+
			"			<td align='right'  "+
			"				style='color:#FFFFFF' "+
			"			> "+
			"				<span "+
			"					onClick='"+this.nameObj+".hide()' "+
			"					style='cursor:pointer'>cerrar "+
			"				</span> "+
			"			</td> "+
			"		</tr> ";
	}
	html +=	"		<tr height='"+this.height+"'> "+
		"			<td valign='top' "+backColor+"> "+
		"				"+this.content +
		"			</td> "+
		"		</tr> "+
		"	</table>"+
		"</div>";
	document.write(html);
}

PopDiv.prototype.moveDiv = function(){
		/*
		if (objetoDND == null) { return; }
		if (typeof(objetoDND) == "undefined"){ return; }
		newX = (event.clientX + document.body.scrollLeft);
		newY = (event.clientY + document.body.scrollTop);
		distanceX = (newX - currentX);
		distanceY = (newY - currentY);
		currentX = newX;
		currentY = newY;
		objetoDND.style.pixelLeft += distanceX;
		objetoDND.style.pixelTop += distanceY;
		event.returnValue = false;
		*/
}


PopDiv.prototype.show = function (){
	obj = document.getElementById(this.idDiv);
	if(obj){
		obj.style.display = 'block';
	}else{
		alert("No se encontró el objeto");
	}

}

PopDiv.prototype.hide = function (){
	obj = document.getElementById(this.idDiv);
	if(obj){
		obj.style.display = 'none';
	}else{
		alert("No se encontró el objeto");
	}
}