// Title: tigra slider control pro
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_slider_control_pro/
// Version: 1.2
// Date: 11/06/2007
// Notes: This script is commercial software. License must be purchased to use it legally.

function slider (a_init, a_tpl) {

 this.f_setValue = f_sliderSetValue;
 this.f_getPos = f_sliderGetPos;
 this.f_getClip = f_sliderGetClip;
 this.f_onButton = f_sliderOnButton;
 
 // register in the global collection 
 if (!window.A_SLIDERS)
 window.A_SLIDERS = [];
 this.n_id = window.A_SLIDERS.length;
 window.A_SLIDERS[this.n_id] = this;

 // save config parameters in the slider object
 var s_key;
 if (a_tpl)
 for (s_key in a_tpl)
 this[s_key] = a_tpl[s_key];
 for (s_key in a_init)
 this[s_key] = a_init[s_key];
 for (s_key in this)
 if (typeof(this[s_key]) == 'string' && s_key.indexOf('s_img') == 0) {
 var e_img = new Image();
 e_img.src = this[s_key];
 this['cache_' + s_key] = e_img;
 }

 this.n_pix2value = this.n_pathLength / (this.n_maxValue - this.n_minValue);
 this.n_increments = this.n_step ? this.n_step : (this.n_maxValue - this.n_minValue) / 10;
 if (this.n_value == null)
 this.n_value = this.n_minValue;

 // generate the control's HTML
 var s_butMinus = this.s_imgMinus ? '<td' + (this.s_imgMinusHover ? ' onmouseover="A_SLIDERS[' + this.n_id + '].f_onButton(\'Minus\', \'over\')"' : '') + ' onmouseout="A_SLIDERS[' + this.n_id + '].f_onButton(\'Minus\', \'out\')" onmousedown="A_SLIDERS[' + this.n_id + '].f_onButton(\'Minus\', \'down\')" onmouseup="A_SLIDERS[' + this.n_id + '].f_onButton(\'Minus\', \'up\')"><img src="' + this.s_imgMinus + '" ondrag="return false" name="sl' + this.n_id + 'minus" id="sl' + this.n_id + 'minus" border="0" style="cursor:pointer;"/></td>' : 0,
 s_slider = 
 '<td background="' + this.s_imgControl + '"><div id="sl' + this.n_id + 'base" onmousedown="return f_sliderMouseDown(' + this.n_id + ')" valign="top" style="position:relative;width:' + this.n_controlWidth + 'px;height:' + this.n_controlHeight + 'px;">' +
 (this.s_imgBar ? '<img src="' + this.s_imgBar + '" border="0" style="position:absolute;left:0px;top:0px;visibility:hidden;z-index:' + this.n_zIndex + '" name="sl' + this.n_id + 'bar" id="sl' + this.n_id + 'bar" onmousedown="return f_sliderMouseDown(' + this.n_id + ')">' : '') +
 '<img src="' + this.s_imgSlider + '" width="' + this.n_sliderWidth + '" height="' + this.n_sliderHeight + '" border="0" style="position:relative;left:' + this.n_pathLeft + 'px;top:' + this.n_pathTop + 'px;z-index:' + (this.n_zIndex + 1) + ';cursor:pointer;visibility:hidden;" name="sl' + this.n_id + 'slider" id="sl' + this.n_id + 'slider"/></div></td>',
 s_butPlus = this.s_imgPlus ? '<td' + (this.s_imgPlusHover ? ' onmouseover="A_SLIDERS[' + this.n_id + '].f_onButton(\'Plus\', \'over\')"' : '') + ' onmouseout="A_SLIDERS[' + this.n_id + '].f_onButton(\'Plus\', \'out\')" onmousedown="A_SLIDERS[' + this.n_id + '].f_onButton(\'Plus\', \'down\')" onmouseup="A_SLIDERS[' + this.n_id + '].f_onButton(\'Plus\', \'up\')"><img src="' + this.s_imgPlus + '" ondrag="return false" name="sl' + this.n_id + 'plus" id="sl' + this.n_id + 'plus" border="0" style="cursor:pointer;"/></td>' : 0;
 if (this.b_reverse) {
 var s_temp = s_butMinus;
 s_butMinus = s_butPlus;
 s_butPlus = s_temp;
 }

 document.write(
 '<table cellpadding="0" cellspacing="' + this.n_spacing + '" border="0"><tr>' +
 (this.b_vertical ? (s_butPlus ? s_butPlus + '</tr><tr>' : '') : (s_butMinus ? s_butMinus : '')) +
 s_slider +
 (this.b_vertical ? (s_butMinus ? '</tr><tr>' + s_butMinus : '') : (s_butPlus ? s_butPlus : '')) +
 '</tr></table>'
 );
 
 this.e_imgBase = get_element('sl' + this.n_id + 'base');
 this.e_imgSlider = get_element('sl' + this.n_id + 'slider');
 if (s_butMinus) this.e_imgMinus = get_element('sl' + this.n_id + 'minus');
 if (s_butPlus) this.e_imgPlus = get_element('sl' + this.n_id + 'plus');
 
 // preset to the value in the input box if available
 var e_input = this.s_form == null
 ? get_element(this.s_name)
 : document.forms[this.s_form]
 ? document.forms[this.s_form].elements[this.s_name]
 : null;
 this.f_setValue(e_input && e_input.value != '' ? e_input.value : null, 1);
 this.e_imgSlider.style.visibility = 'visible';
 
 if (this.s_imgBar) {
 this.e_imgBar = get_element('sl' + this.n_id + 'bar');
 this.e_imgBar.style.clip = this.f_getClip();
 this.e_imgBar.style.visibility = 'visible'
 }

 // safely hook document/window events
 if (document.addEventListener) {
 document.addEventListener('mousemove', f_sliderMouseMove, false);
 document.addEventListener('mouseup', f_sliderMouseUp, false);
 }
 if (window.attachEvent) {
 document.attachEvent('onmousemove', f_sliderMouseMove);
 document.attachEvent('onmouseup', f_sliderMouseUp);
 }
 else {
 document.onmousemove = f_sliderMouseMove;
 document.onmouseup = f_sliderMouseUp;
 }
}

function f_sliderSetValue (n_value, b_noInputCheck) {
 if (n_value == null)
 n_value = this.n_value == null ? this.n_minValue : this.n_value;
 if (isNaN(n_value))
 return false;
 // round to closest multiple if step is specified
 if (this.n_step)
 n_value = Math.round((n_value - this.n_minValue) / this.n_step) * this.n_step + this.n_minValue;
 // smooth out the result
 if (n_value % 1)
 n_value = Math.round(n_value * 1e5) / 1e5;

 if (n_value < this.n_minValue)
 n_value = this.n_minValue;
 if (n_value > this.n_maxValue)
 n_value = this.n_maxValue;

 this.n_value = n_value;

 // move the slider
 var n_pxOffset = Math.round((n_value - this.n_minValue) * this.n_pix2value);
 if (this.b_vertical)
 this.e_imgSlider.style.top = (this.b_reverse
 ? (this.n_pathTop + n_pxOffset)
 : (this.n_pathTop + this.n_pathLength - n_pxOffset)) + 'px';
 else
 this.e_imgSlider.style.left = (this.b_reverse
 ? (this.n_pathLength - n_pxOffset + this.n_pathLeft)
 : (this.n_pathLeft + n_pxOffset)) + 'px';

 // save new value
 var e_input;
 if (this.s_form == null) {
 e_input = get_element(this.s_name);
 if (!e_input)
 return b_noInputCheck ? null : f_sliderError(this.n_id, "Can not find the input with ID='" + this.s_name + "'.");
 }
 else {
 var e_form = document.forms[this.s_form];
 if (!e_form)
 return b_noInputCheck ? null : f_sliderError(this.n_id, "Can not find the form with NAME='" + this.s_form + "'.");
 e_input = e_form.elements[this.s_name];
 if (!e_input)
 return b_noInputCheck ? null : f_sliderError(this.n_id, "Can not find the input with NAME='" + this.s_name + "'.");
 }
 // handle min and max values
 if (this.e_imgMinus) {
 if (this.n_value == this.n_minValue) {
 this.e_imgMinusDisabled = true;
 this.e_imgMinus.src = this.s_imgMinusDisabled ? this.s_imgMinusDisabled : this.s_imgMinus;
 }
 else if (this.e_imgMinusDisabled) {
 this.e_imgMinusDisabled = false;
 this.e_imgMinus.src = this.s_imgMinus;
 }
 }
 if (this.e_imgPlus) {
 if (this.n_value == this.n_maxValue) {
 this.e_imgPlusDisabled = true;
 this.e_imgPlus.src = this.s_imgPlusDisabled ? this.s_imgPlusDisabled : this.s_imgPlus;
 }
 else if (this.e_imgPlusDisabled) {
 this.e_imgPlusDisabled = false;
 this.e_imgPlus.src = this.s_imgPlus;
 }
 }
 if (this.e_imgBar)
 this.e_imgBar.style.clip = this.f_getClip();

 e_input.value = n_value;
 if (this.h_onChange)
 this.h_onChange(n_value);
}

function f_sliderOnButton (s_button, s_event) {
 // customer event hanldler
 if (this.h_onButton && !this.h_onButton(s_button, s_event))
 return;

 // switch back background even if disabled
 if (this.b_bgActive && s_event == 'up') {
 this.e_imgBase.style.backgroundImage = 'url(' + this.s_imgControl + ')';
 this.b_bgActive = false;
 }

 // ignore if button is disabled
 if (this['e_img' + s_button + 'Disabled'])
 return;

 var e_img = this['e_img' + s_button];

 if (s_event == 'over') { // mouseover
 e_img.src = this['s_img' + s_button + 'Hover'];
 return;
 }
 if (s_event == 'out') { // mouseout
 if (this.e_tmRepeat)
 clearTimeout(this.e_tmRepeat);
 e_img.src = this['s_img' + s_button];
 return;
 }
 if (s_event == 'down') { // mousedown
 if (this['s_img' + s_button + 'Down'])
 e_img.src = this['s_img' + s_button + 'Down'];
 if (this.s_imgControlActive && !this.b_bgActive) {
 this.e_imgBase.style.backgroundImage = 'url(' + this.s_imgControlActive + ')';
 this.b_bgActive = true;
 }

 this.f_setValue(this.n_value + this.n_increments * (s_button == 'Minus' ? -1 : 1));
 this.e_tmRepeat = setTimeout("A_SLIDERS[" + this.n_id + "].f_onButton('" + s_button + "', 'down')", this.n_repeatPeriod);
 return;
 }
 if (s_event == 'up') { // mouseup
 if (this.e_tmRepeat)
 clearTimeout(this.e_tmRepeat);
 if (this['s_img' + s_button + 'Down'])
 e_img.src = this['s_img' + s_button + 'Hover'] ? this['s_img' + s_button + 'Hover'] : this['s_img' + s_button];
 return; 
 }
}

// get absolute position of the element in the document
function f_sliderGetPos (b_vertical, b_absPos) {
 var n_pos = 0,
 o_elem = o_elem2 = this.e_imgBase,
 s_coord = (b_vertical ? 'Top' : 'Left');
 
 while (o_elem) {
 if (b_absPos || !o_elem.style.position || o_elem.style.position == 'relative')
 n_pos += o_elem["offset" + s_coord];
 o_elem = o_elem.offsetParent;
 }
 o_elem = o_elem2;

 var n_offset;
 while (o_elem.tagName != "BODY") {
 n_offset = o_elem["scroll" + s_coord];
 if (n_offset)
 n_pos -= o_elem["scroll" + s_coord];
 o_elem = o_elem.parentNode;
 }
 return n_pos;
}

function f_sliderMouseDown (n_id) {
 window.n_activeSliderId = n_id;
 var o_slider = A_SLIDERS[n_id];
 if (o_slider.s_imgControlActive) {
 o_slider.e_imgBase.style.backgroundImage = 'url(' + o_slider.s_imgControlActive + ')';
 o_slider.b_bgActive = true;
 }
 f_sliderMouseMove();
 return false;
}

function f_sliderGetClip () {
 return 'rect(' +
 (this.b_vertical && !this.b_reverse ? (parseInt(this.e_imgSlider.style.top) + Math.round(this.n_sliderHeight / 2)) + 'px' : 'auto') + ',' +
 (!this.b_vertical && !this.b_reverse ? (parseInt(this.e_imgSlider.style.left) + Math.round(this.n_sliderWidth / 2)) + 'px' : 'auto') + ',' +
 (this.b_vertical && this.b_reverse ? (parseInt(this.e_imgSlider.style.top) + Math.round(this.n_sliderHeight / 2)) + 'px' : 'auto') + ',' +
 (!this.b_vertical && this.b_reverse ? (parseInt(this.e_imgSlider.style.left) + Math.round(this.n_sliderWidth / 2)) + 'px' : 'auto') + ')';
}

function f_sliderMouseUp (e_event, b_watching) {
 if (window.n_activeSliderId != null) {
 var o_slider = window.A_SLIDERS[window.n_activeSliderId];

 o_slider.f_setValue(o_slider.n_minValue + (o_slider.b_vertical
 ? o_slider.b_reverse
 ? (parseInt(o_slider.e_imgSlider.style.top) - o_slider.n_pathTop)
 : (o_slider.n_pathLength - parseInt(o_slider.e_imgSlider.style.top) + o_slider.n_pathTop)
 : o_slider.b_reverse
 ? (o_slider.n_pathLength - parseInt(o_slider.e_imgSlider.style.left) + o_slider.n_pathLeft)
 : (parseInt(o_slider.e_imgSlider.style.left) - o_slider.n_pathLeft)
 ) / o_slider.n_pix2value);
 window.status = o_slider.n_value;

 if (b_watching) return;
 if (o_slider.b_bgActive) {
 o_slider.e_imgBase.style.backgroundImage = 'url(' + o_slider.s_imgControl + ')';
 o_slider.b_bgActive = false;
 }
 window.n_activeSliderId = null;
 }
 if (window.f_savedMouseUp)
 return window.f_savedMouseUp(e_event);
}

function f_sliderMouseMove (e_event) {

 if (!e_event && window.event) e_event = window.event;

 // save mouse coordinates
 if (e_event) {
 if (e_event.clientX != null) window.n_mouseX = e_event.clientX + f_scrollLeft();
 if (e_event.clientY != null) window.n_mouseY = e_event.clientY + f_scrollTop();
 }

 // check if in drag mode
 if (window.n_activeSliderId != null) {
 var o_slider = window.A_SLIDERS[window.n_activeSliderId];

 var n_pxOffset;
 if (o_slider.b_vertical) {
 var n_sliderTop = window.n_mouseY - o_slider.n_sliderHeight / 2 - o_slider.f_getPos(1, 1);
 // limit the slider movement
 if (n_sliderTop < o_slider.n_pathTop)
 n_sliderTop = o_slider.n_pathTop;
 var n_pxMax = o_slider.n_pathTop + o_slider.n_pathLength;
 if (n_sliderTop > n_pxMax)
 n_sliderTop = n_pxMax;
 o_slider.e_imgSlider.style.top = n_sliderTop + 'px';
 n_pxOffset = o_slider.n_pathLength - n_sliderTop + o_slider.n_pathTop;
 }
 else {
 var n_sliderLeft = window.n_mouseX - o_slider.n_sliderWidth / 2 - o_slider.f_getPos(0, 1);
 // limit the slider movement
 if (n_sliderLeft < o_slider.n_pathLeft)
 n_sliderLeft = o_slider.n_pathLeft;
 var n_pxMax = o_slider.n_pathLeft + o_slider.n_pathLength;
 if (n_sliderLeft > n_pxMax)
 n_sliderLeft = n_pxMax;
 o_slider.e_imgSlider.style.left = n_sliderLeft + 'px';
 n_pxOffset = n_sliderLeft - o_slider.n_pathLeft;
 }

 if (o_slider.e_imgBar && !o_slider.b_watch)
 o_slider.e_imgBar.style.clip = o_slider.f_getClip();
 if (o_slider.b_watch)
 f_sliderMouseUp(e_event, 1);

 if (o_slider.h_onMove)
 o_slider.h_onMove(o_slider.n_value);
 return false;
 }
 
 if (window.f_savedMouseMove)
 return window.f_savedMouseMove(e_event);
}
// get the scroller positions of the page
function f_scrollLeft() {
 return f_filterResults (
 window.pageXOffset ? window.pageXOffset : 0,
 document.documentElement ? document.documentElement.scrollLeft : 0,
 document.body ? document.body.scrollLeft : 0
 );
}
function f_scrollTop() {
 return f_filterResults (
 window.pageYOffset ? window.pageYOffset : 0,
 document.documentElement ? document.documentElement.scrollTop : 0,
 document.body ? document.body.scrollTop : 0
 );
}
function f_filterResults(n_win, n_docel, n_body) {
 var n_result = n_win ? n_win : 0;
 if (n_docel && (!n_result || (n_result > n_docel)))
 n_result = n_docel;
 return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}
function f_sliderError (n_id, s_message) {
 alert("Slider #" + n_id + " Error:\n" + s_message);
 window.n_activeSliderId = null;
}
get_element = document.all ?
 function (s_id) { return document.all[s_id] } :
 function (s_id) { return document.getElementById(s_id) };