/**
 * AjaxScroll v0.1 (jQuery Plugins)
 *
 * @author Timmy Tin (ycTIN)
 * @license GPL
 * @version 0.1
 * @copyright Timmy Tin (ycTIN)
 * @website http://project.yctin.com/ajaxscroll
 *
 */
$.fn.ajaxScroll=function(opt){opt=jQuery.extend({batchNum:5,batchSize:30,horizontal:false,batchTemplate:null,boxTemplate:null,batchClass:"batch",boxClass:"box",emptyBatchClass:"empty",scrollPaneClass:"scrollpane",lBound:"auto",uBound:"auto",eBound:"auto",maxOffset:1000,scrollDelay:600,endDelay:100,updateBatch:null,updateEnd:null},opt);return this.each(function(){var ele=this;var $me=jQuery(this);var $sp;var fnEnd,fnScroll;var offset=0;var lsp=-1;_css();opt.boxTemplate=(opt.boxTemplate||"<span class='"+opt.boxClass+"'>&nbsp</span>");if(opt.horizontal){opt.batchTemplate=(opt.batchTemplate||"<td></td>");$sp=jQuery("<table><tr></tr></table>").addClass(opt.scrollPaneClass);$me.append($sp);offset=batch($sp.find("tr"),offset,opt);_bz();_ab();fnEnd=hEnd;fnScroll=hScroll;}else{opt.batchTemplate=(opt.batchTemplate||"<span></span>");$sp=jQuery("<div></div>").addClass(opt.scrollPaneClass);$me.append($sp);offset=batch($sp,offset,opt);_bz();_ab();fnEnd=vEnd;fnScroll=vScroll;}setTimeout(monEnd,opt.endDelay);if(typeof opt.updateBatch=='function'){setTimeout(monScroll,opt.scrollDelay);}function _css(){if(opt.horizontal){$me.css({"overflow-x":"auto","overflow-y":"hidden"});}else{$me.css({"overflow-x":"hidden","overflow-y":"auto"});}}function _ab(){var os,b;if(opt.horizontal){os=$me.find('.batch:first').next().offset().left;b=($me.width()/os+1)*os;}else{os=$me.find('.batch:first').next().offset().top;b=($me.height()/os+1)*os;}if("auto"==opt.uBound){opt.uBound=b;}if("auto"==opt.lBound){opt.lBound=-b;}if("auto"==opt.eBound){opt.eBound=b*2;}}function _bz(){$me.scrollTop(0).scrollLeft(0);};function batch($s,o,opt){var $b,i,rp=opt.batchNum;while(rp--){$b=jQuery(opt.batchTemplate).attr({offset:o,len:opt.batchSize}).addClass(opt.batchClass+" "+opt.emptyBatchClass);i=opt.batchSize;while(i--&&opt.maxOffset>o++){$b.append(opt.boxTemplate);}$s.append($b);}return o;};function vScroll(){var so=$me.scrollTop();if(lsp!=so){lsp=so;var co=$me.offset().top;$sp.find('> .'+opt.emptyBatchClass).each(function(i,obj){var $b=jQuery(obj);var p=$b.position().top-co;if(opt.lBound>p||p>opt.uBound){return;}opt.updateBatch($b.removeClass(opt.emptyBatchClass));});}};function hScroll(){var so=$me.scrollLeft();if(lsp!=so){lsp=so;var co=$me.offset().left;$sp.find('tr > .'+opt.emptyBatchClass).each(function(i,obj){var $b=jQuery(obj);var p=$b.position().left-co;if(opt.lBound>p||p>opt.uBound){return;}opt.updateBatch($b.removeClass(opt.emptyBatchClass));});}};function vEnd(){if(ele.scrollTop>0&&ele.scrollHeight-ele.scrollTop<opt.eBound){offset=batch($sp,offset,opt);return 1;}return opt.endDelay;};function hEnd(){if(ele.scrollLeft>0&&ele.scrollWidth-ele.scrollLeft<opt.eBound){offset=batch($sp.find("tr:first"),offset,opt);return 1;}return opt.endDelay;};function monScroll(){fnScroll();setTimeout(monScroll,opt.scrollDelay);};function monEnd(){if(offset<opt.maxOffset){setTimeout(monEnd,fnEnd());}}});};