jQuery.fn.setScroll=function(_scroll,_scroll_up,_scroll_down,_scroll_bar){this.each(function(){var _bar_margin=3;var _scroll_control=jQuery('<div class="scroll_zone">').width(_scroll.width).css({'position':'absolute','float':'none',margin:0,padding:0}).css('background','url('+_scroll.img+')');var _scroll_control_up=jQuery('<img class="scroll_up">').attr('src',_scroll_up.img).width(_scroll.width).css({'z-index':'1000','position':'absolute','top':'0','float':'none',margin:0,padding:0});var _scroll_control_down=jQuery('<img class="scroll_down">').attr('src',_scroll_down.img).width(_scroll.width).css({'z-index':'1000','position':'absolute','bottom':'0','float':'none',margin:0,padding:0});var _scroll_control_bar=jQuery('<img class="scroll_bar">').attr('src',_scroll_bar.img).width(_scroll.width).css({'z-index':'1500','cursor':'pointer','position':'absolute','float':'none',margin:0,padding:0,height:_scroll_bar.height+'px'}).css('top',_scroll_up.height+_bar_margin+'px');_scroll_control.append(_scroll_control_up);_scroll_control.append(_scroll_control_bar);_scroll_control.append(_scroll_control_down);var _oheight=jQuery(this).css('height').substring(0,jQuery(this).css('height').indexOf('px'));var _owidth=jQuery(this).width();var _ocontent=jQuery(this).html();if(jQuery(this).attr('scrollHeight')<=_oheight)return;var _content_zone=jQuery('<div>').html(_ocontent).css({width:_owidth-10+'px',height:_oheight+'px',overflow:'hidden','float':'none',margin:0,padding:0});jQuery(this).css({'overflow':'hidden'});jQuery(this).empty().append(_content_zone).css({position:'relative'}).append(_scroll_control.css({left:_owidth-_scroll.width+'px',top:'0',height:_oheight+'px',margin:0,padding:0}));jQuery(this).find('.scroll_bar').mousedown(function(){jQuery(document).mousemove(function(e){var _content=_content_zone.get(0);var lastProgress=_scroll_control_bar.attr('progress');_scroll_control_bar.attr('progress',e.pageY);var nowProgress=_scroll_control_bar.css('top');nowProgress=nowProgress.substring(0,nowProgress.indexOf('px'));nowProgress=Number(nowProgress)+Number(e.pageY-lastProgress);var preProgress=nowProgress/(_oheight-_scroll_up.height-_scroll_down.height-_scroll_bar.height-(2*_bar_margin));_content.scrollTop=((_content.scrollHeight-_content.offsetHeight)*preProgress);if(nowProgress<(_scroll_up.height+_bar_margin)){_content.scrollTop=0;return false;}else if(nowProgress>(_oheight-(_scroll_down.height+_scroll_bar.height+_bar_margin))){return false;}
try{_scroll_control_bar.css('top',nowProgress+'px');}catch(e){}
return false;});return false;}).mouseout(function(){jQuery(document).mouseup(function(){jQuery(document).unbind('mousemove');})})});}