// Determine browser and version.

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();
var min = 0;
var max = 40;

// Global object to hold drag information.

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

function dragStart(event, id) {
  var el;
  var y;
  
  var order = 0;
  var position = 't';
  var respect_position = 'd';
  
  if(id)
  {
  	var ppp = id.split('_');
  	order = ppp[0];
  	position = ppp[1];
  	if(position == 't')
  		respect_position = 'd';
  	else
  		respect_position = 't';
  }
  
  if(slider[order] == false)
  	return;

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

  if (id)
  {
    dragObj.elNode = document.getElementById('slider_'+id);
    dragObj.elRespect = document.getElementById('slider_'+order+'_'+respect_position);
    dragObj.order = order;
    dragObj.position = position;
    dragObj.respectPosition = respect_position;
	
	/*document.slider.top_introaprperiod.value = getNo(document.getElementById('value_1_t').innerHTML);
	document.slider.top_regularapr.value = getNo(document.getElementById('value_2_t').innerHTML);
	document.slider.top_annualfee.value = getNo(document.getElementById('value_3_t').innerHTML);
	document.slider.top_creditneeded.value = document.getElementById('value_4_t').innerHTML;
	document.slider.top_bonuspoints.value = getNo(document.getElementById('value_5_t').innerHTML);
	document.slider.top_pointsperdollar.value = getNo(document.getElementById('value_6_t').innerHTML);
	
	document.slider.bottom_introaprperiod.value = getNo(document.getElementById('value_1_d').innerHTML);
	document.slider.bottom_regularapr.value = getNo(document.getElementById('value_2_d').innerHTML);
	document.slider.bottom_annualfee.value = getNo(document.getElementById('value_3_d').innerHTML);
	document.slider.bottom_creditneeded.value = document.getElementById('value_4_d').innerHTML;
	document.slider.bottom_bonuspoints.value = getNo(document.getElementById('value_5_d').innerHTML);
	document.slider.bottom_pointsperdollar.value = getNo(document.getElementById('value_6_d').innerHTML);
	*/
	
  }
  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) {
    y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop;
  }
  if (browser.isNS) {
    y = event.clientY + window.scrollY;
  }

  // Save starting positions of cursor and element.

  dragObj.cursorStartY = y;
  dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);

  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 getNo(stringNo)
{
	var parsedNo = "";
	for(var n=0; n<stringNo.length; n++)
	{
	var i = stringNo.substring(n,n+1);
	if(i=="1"||i=="2"||i=="3"||i=="4"||i=="5"||i=="6"||i=="7"||i=="8"||i=="9"||i=="0")
	parsedNo += i;
	}
	return parseInt(parsedNo);
} 

function dragGo(event) {

  var y;
  
  // Get cursor position with respect to the page.

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

	var current = 0;
	var displayElements = document.getElementById('referent_'+dragObj.order).value.split(',');
	var new_y = dragObj.elStartTop  + y - dragObj.cursorStartY;
	if(dragObj.position == 't')
	{
		var respect_pos = parseInt(dragObj.elRespect.style.top,  10);
		if(new_y < min)
		{
			new_y = min;
		}
		if(new_y > respect_pos + 20)
		{
			new_y = respect_pos + 20;
		}
		curr2 = parseInt(((new_y + 0)/ (max - min + 20)) * (displayElements.length - 1));
		current = parseInt(((new_y + 0)/ (max - min + 20)) * 100);
	}
	else if(dragObj.position == 'd')
	{
		var respect_pos = parseInt(dragObj.elRespect.style.top,  10);
		if(new_y > max)
		{
			new_y = max;
		}
		if(new_y < respect_pos - 20)
		{
			new_y = respect_pos - 20;
		}
		curr2 = parseInt(((new_y + 20)/ (max - min + 20)) * (displayElements.length - 1));
		current = parseInt(((new_y + 20)/ (max - min + 20)) * 100);
	}
	
	document.getElementById('value_'+dragObj.order+'_'+dragObj.position).innerHTML = displayElements[curr2];
	//document.getElementById('value_'+dragObj.order+'_'+dragObj.position).innerHTML = new_y+'/'+current+' '+curr2+' '+displayElements.length;
	

  // Move drag element by the same amount the cursor has moved.
  dragObj.elNode.style.top  = new_y + "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 slider = new Array();
slider[1] = true;
slider[2] = true;
slider[3] = true;
slider[4] = true;
slider[5] = true;
slider[6] = true;

function killSlider(id) {
	slider[id] = !slider[id];
	if(slider[id])
	{
		document.getElementById('background_'+id).style.backgroundColor = "#fff";
	}
	else
	{
		document.getElementById('background_'+id).style.backgroundColor = "#eee";
	}
}