var slider = new Object()

//---------------------------------+
//  CARPE  S l i d e r      1.5.1  |
//  2008 - 07 - 09                 |
//  By Tom Hermansson Snickars     |
//  Copyright CARPE Design         |
//  http://carpe.ambiprospect.com/ |
//---------------------------------+

// Global vars. You don't need to make changes here to change your sliders.
// Changing the attributes in your (X)HTML file is enough.
 slider.carpemouseover                = false;
 slider.carpeDefaultSliderLength      = 85;
 slider.carpeSliderDefaultOrientation = 'horizontal';
 slider.carpeSliderClassName          = 'carpe_slider';
 slider.carpeSliderDisplayClassName   = 'carpe_slider_display';
 slider.carpesliders                  = [];
 slider.carpedisplays                 = [];
 slider.carpeslider                   = {};
 slider.carpedisplay                  = {};
 slider.slider_finished_form;

// carpeAddLoadEvent
 /*
slider.carpeAddLoadEvent = function(func)
{
		var oldonload = window.onload;
		if (typeof window.onload != 'function') {
			window.onload = func;
		}
		else {
			window.onload = function() {
				oldonload();
				func();
			};
		}
}
*/
// carpeGetElementsByClass: Cross-browser function that returns
// an array with all elements that have a class attribute that
// contains className
slider.carpeGetElementsByClass = function(className)
{
	var classElements = new Array();
	var els = document.getElementsByTagName("*");
	var elsLen = els.length;
	var pattern = new RegExp("\\b" + className + "\\b");
	for (var i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}
// carpeLeft: Cross-browser version of "element.style.left"
// Returns or sets the horizontal position of an element.
slider.carpeLeft = function (elmnt, pos)
{
	if (!(elmnt = document.getElementById(elmnt))) return 0;
	if (elmnt.style && (typeof(elmnt.style.left) == 'string')) {
		if (typeof(pos) == 'number') elmnt.style.left = pos + 'px';
		else {
			pos = parseInt(elmnt.style.left);
			if (isNaN(pos)) pos = 0;
		}
	}
	else if (elmnt.style && elmnt.style.pixelLeft) {
		if (typeof(pos) == 'number') elmnt.style.pixelLeft = pos;
		else pos = elmnt.style.pixelLeft;
	}
	return pos;
}
// carpeTop: Cross-browser version of "element.style.top"
// Returns or sets the vertical position of an element.
slider.carpeTop = function (elmnt, pos)
{
	if (!(elmnt = document.getElementById(elmnt))) return 0;
	if (elmnt.style && (typeof(elmnt.style.top) == 'string')) {
		if (typeof(pos) == 'number') elmnt.style.top = pos + 'px';
		else {
			pos = parseInt(elmnt.style.top);
			if (isNaN(pos)) pos = 0;
		}
	}
	else if (elmnt.style && elmnt.style.pixelTop) {
		if (typeof(pos) == 'number') elmnt.style.pixelTop = pos;
		else pos = elmnt.style.pixelTop;
	}
	return pos;
}
// moveSlider: Handles slider and display while dragging
slider.moveSlider = function (evnt)
{
	var evnt = (!evnt) ? window.event : evnt; // The mousemove event
	if (slider.carpemouseover) { // Only if slider is dragged
		slider.carpeslider.x = slider.carpeslider.startOffsetX + evnt.screenX; // Horizontal mouse position relative to allowed slider positions
		slider.carpeslider.y = slider.carpeslider.startOffsetY + evnt.screenY; // Horizontal mouse position relative to allowed slider positions
		if (slider.carpeslider.x > slider.carpeslider.xMax) slider.carpeslider.x = slider.carpeslider.xMax; // Limit horizontal movement
		if (slider.carpeslider.x < 0) slider.carpeslider.x = 0; // Limit horizontal movement
		if (slider.carpeslider.y > slider.carpeslider.yMax) slider.carpeslider.y = slider.carpeslider.yMax; // Limit vertical movement
		if (slider.carpeslider.y < 0) slider.carpeslider.y = 0; // Limit vertical movement
		slider.carpeLeft(slider.carpeslider.id, slider.carpeslider.x);  // move slider to new horizontal position
		slider.carpeTop(slider.carpeslider.id, slider.carpeslider.y); // move slider to new vertical position
		var sliderVal = slider.carpeslider.x + slider.carpeslider.y; // pixel value of slider regardless of orientation
		var sliderPos = (slider.carpeslider.distance / slider.carpedisplay.valuecount) * 
			Math.round(slider.carpedisplay.valuecount * sliderVal / slider.carpeslider.distance);
		var v = Math.round((sliderPos * slider.carpeslider.scale + slider.carpeslider.from) * // calculate display value
			Math.pow(10, slider.carpedisplay.decimals)) / Math.pow(10, slider.carpedisplay.decimals);
		slider.carpedisplay.value = v; // put the new value in the slider display element
		return false;
	}
	return
}
// slide: Handles the start of a slider move.
slider.slide = function (evnt)
{
	if (!evnt) evnt = window.event; // Get the mouse event causing the slider activation.
	slider.carpeslider = (evnt.target) ? evnt.target : evnt.srcElement; // Get the activated slider element.
	var dist = parseInt(slider.carpeslider.getAttribute('distance')); // The allowed slider movement in pixels.
	slider.carpeslider.distance = dist ? dist : slider.carpeDefaultSliderLength; // Deafault distance from global var.
	var ori = slider.carpeslider.getAttribute('orientation'); // Slider orientation: 'horizontal' or 'vertical'.
	var orientation = ((ori == 'horizontal') || (ori == 'vertical')) ? ori : slider.carpeSliderDefaultOrientation;
		// Default orientation from global variable.
	var displayId = slider.carpeslider.getAttribute('display'); // ID of associated display element.
	slider.carpedisplay = document.getElementById(displayId); // Get the associated display element.
	slider.carpedisplay.sliderId = slider.carpeslider.id; // Associate the display with the correct slider.
	var dec = parseInt(slider.carpedisplay.getAttribute('decimals')); // Number of decimals to be displayed.
	slider.carpedisplay.decimals = dec ? dec : 0; // Default number of decimals: 0.
	var val = parseInt(slider.carpedisplay.getAttribute('valuecount'))  // Allowed number of values in the interval.
	slider.carpedisplay.valuecount = val ? val : slider.carpeslider.distance + 1 // Default number of values: the sliding distance.
	var from = parseFloat(slider.carpedisplay.getAttribute('from')) // Min/start value for the display.
	from = from ? from : 0 // Default min/start value: 0.
	var to = parseFloat(slider.carpedisplay.getAttribute('to')) // Max value for the display.
	to = to ? to : slider.carpeslider.distance // Default number of values: the sliding distance.
	slider.carpeslider.scale = (to - from) / slider.carpeslider.distance // Slider-display scale [value-change per pixel of movement].
	if (orientation == 'vertical') { // Set limits and scale for vertical sliders.
		slider.carpeslider.from = to // Invert for vertical sliders. "Higher is more."
		slider.carpeslider.xMax = 0
		slider.carpeslider.yMax = slider.carpeslider.distance
		slider.carpeslider.scale = -slider.carpeslider.scale // Invert scale for vertical sliders. "Higher is more."
	}
	else { // Set limits for horizontal sliders.
		slider.carpeslider.from = from;
		slider.carpeslider.xMax = slider.carpeslider.distance;
		slider.carpeslider.yMax = 0;
	}
	slider.carpeslider.startOffsetX = slider.carpeLeft(slider.carpeslider.id) - evnt.screenX; // Slider-mouse horizontal offset at start of slider.slide.
	slider.carpeslider.startOffsetY = slider.carpeTop(slider.carpeslider.id) - evnt.screenY; // Slider-mouse vertical offset at start of slider.slide.
	slider.carpemouseover = true;
	document.onmousemove = slider.moveSlider; // Start the action if the mouse is dragged.
	document.onmouseup = slider.sliderMouseUp; // Stop sliding.
	return false;
}
// sliderMouseUp: Handles the mouseup event after moving a slider.
// Snaps the slider position to allowed/displayed value. 
slider.sliderMouseUp = function ()
{
	if (slider.carpemouseover) {
		var v = (slider.carpedisplay.value) ? slider.carpedisplay.value : 0 // Find last display value.
		var pos = (v - slider.carpeslider.from)/(slider.carpeslider.scale) // Calculate slider position (regardless of orientation).
		if (slider.carpeslider.yMax == 0) {
			pos = (pos > slider.carpeslider.xMax) ? slider.carpeslider.xMax : pos;
			pos = (pos < 0) ? 0 : pos;
			slider.carpeLeft(slider.carpeslider.id, pos); // Snap horizontal slider to corresponding display position.
		}
		if (slider.carpeslider.xMax == 0) {
			pos = (pos > slider.carpeslider.yMax) ? slider.carpeslider.yMax : pos;
			pos = (pos < 0) ? 0 : pos;
			slider.carpeTop(slider.carpeslider.id, pos); // Snap vertical slider to corresponding display position.
		}
		if (document.removeEventListener) { // Remove event listeners from 'document' (W3C).
			document.removeEventListener('mousemove', slider.moveSlider, false);
			document.removeEventListener('mouseup', slider.sliderMouseUp, false);
		}
		else if (document.detachEvent) { // Remove event listeners from 'document' (IE).
			document.detachEvent('onmousemove', slider.moveSlider);
			document.detachEvent('onmouseup', slider.sliderMouseUp);
			document.releaseCapture();
			
		}
	}
	slider.carpemouseover = false; // Stop the sliding.
	
	var level = (100 - pos);
	
	if (level < 15) {
		level = 15;
	}
	
	slider.slider_finished_form.volumelevel.value = level;
	slider.slider_finished_form.onsubmit();
}
slider.focusDisplay = function (evnt)
{
	if (!evnt) evnt = window.event; // Get the mouse event causing the display activation.
	var carpedispl = (evnt.target) ? evnt.target : evnt.srcElement; // Get the activated display element.
	var lock = carpedispl.getAttribute('typelock'); // Is the user allowed to type into the display?
	if (lock == 'on') {
		//slider.carpedisplay.blur();
		carpedispl.blur();
	}
	return;
}
slider.carpeInit = function (form) // Set up the sliders and the displays.
{
	slider.slider_finished_form = form;
	slider.carpesliders = slider.carpeGetElementsByClass(slider.carpeSliderClassName) // Find the horizontal sliders.
	for (var i = 0; i < slider.carpesliders.length; i++) {
		slider.carpesliders[i].onmousedown = slider.slide; // Attach event listener.
	}
	slider.carpedisplays = slider.carpeGetElementsByClass(slider.carpeSliderDisplayClassName) // Find the displays.
	for (var i = 0; i < slider.carpedisplays.length; i++) {
		slider.carpedisplays[i].value = slider.carpedisplays[i].defaultValue; // Resets display on page reload.
		slider.carpedisplays[i].onfocus = slider.focusDisplay; // Attach event listener.
	}
}