var js_rolling=function(box){if(box.nodeType==1){this.box=box;}else{this.box=document.getElementById(box);}
this.is_rolling=false;this.mouseover_pause=true;this.direction=1;this.children=null;this.move_gap=1;this.time_dealy=100;this.time_dealy_pause=1000;this.time_timer=null;this.time_timer_pause=null;this.mouseover=false;this.init();this.set_direction(this.direction);}
js_rolling.prototype.init=function(){this.box.style.position='relative';this.box.style.overflow='hidden';var children=this.box.childNodes;for(var i=(children.length-1);0<=i;i--){if(children[i].nodeType==1){children[i].style.position='relative';}else{this.box.removeChild(children[i]);}}
var thisC=this;this.box.onmouseover=function(){if(!thisC.mouseover_pause){return;}
thisC.mouseover=true;if(!thisC.time_timer_pause){thisC.pause();}}
this.box.onmouseout=function(){if(!thisC.mouseover_pause){return;}
thisC.mouseover=false;if(!thisC.time_timer_pause){thisC.resume();}}}
js_rolling.prototype.set_direction=function(direction){this.direction=direction;if(this.direction==2||this.direction==4){this.box.style.whiteSpace='nowrap';}else{this.box.style.whiteSpace='normal';}
var children=this.box.childNodes;for(var i=(children.length-1);0<=i;i--){if(this.direction==1){children[i].style.display='block';}else if(this.direction==2){children[i].style.textlign='right';children[i].style.display='inline';}else if(this.direction==3){children[i].style.display='block';}else if(this.direction==4){children[i].style.display='inline';}}
this.init_element_children();}
js_rolling.prototype.init_element_children=function(){var children=this.box.childNodes;this.children=children;for(var i=(children.length-1);0<=i;i--){if(this.direction==1){children[i].style.top='0px';}else if(this.direction==2){children[i].style.left='-'+this.box.firstChild.offsetWidth+'px';}else if(this.direction==3){children[i].style.top='-'+this.box.firstChild.offsetHeight+'px';}else if(this.direction==4){children[i].style.left='0px';}}}
js_rolling.prototype.act_move_up=function(){for(var i=0,m=this.children.length;i<m;i++){var child=this.children[i];child.style.top=(parseInt(child.style.top)-this.move_gap)+'px';}
if((this.children[0].offsetHeight+parseInt(this.children[0].style.top))<=0){this.box.appendChild(this.children[0]);this.init_element_children();this.pause_act();}}
js_rolling.prototype.move_up=function(){if(this.direction!=1&&this.direction!=3){return false;}
this.box.appendChild(this.children[0]);this.init_element_children();this.pause_act();}
js_rolling.prototype.act_move_down=function(){for(var i=0,m=this.children.length;i<m;i++){var child=this.children[i];child.style.top=(parseInt(child.style.top)+this.move_gap)+'px';}
if(parseInt(this.children[0].style.top)>=0){this.box.insertBefore(this.box.lastChild,this.box.firstChild);this.init_element_children();this.pause_act();}}
js_rolling.prototype.move_down=function(){if(this.direction!=1&&this.direction!=3){return false;}
this.box.insertBefore(this.box.lastChild,this.box.firstChild);this.init_element_children();this.pause_act();}
js_rolling.prototype.act_move_left=function(){for(var i=0,m=this.children.length;i<m;i++){var child=this.children[i];child.style.left=(parseInt(child.style.left)-this.move_gap)+'px';}
if((this.children[0].offsetWidth+parseInt(this.children[0].style.left))<=0){this.box.appendChild(this.box.firstChild);this.init_element_children();this.pause_act();}}
js_rolling.prototype.move_left=function(){if(this.direction!=2&&this.direction!=4){return false;}
this.box.appendChild(this.box.firstChild);this.init_element_children();this.pause_act();}
js_rolling.prototype.act_move_right=function(){for(var i=0,m=this.children.length;i<m;i++){var child=this.children[i];child.style.left=(parseInt(child.style.left)+this.move_gap)+'px';}
if(parseInt(this.box.lastChild.style.left)>=0){this.box.insertBefore(this.box.lastChild,this.box.firstChild);this.init_element_children();this.pause_act();}}
js_rolling.prototype.move_right=function(){if(this.direction!=2&&this.direction!=4){return false;}
this.box.insertBefore(this.box.lastChild,this.box.firstChild);this.init_element_children();this.pause_act();}
js_rolling.prototype.start=function(){var thisC=this;this.stop();this.is_rolling=true;var act=function(){if(thisC.is_rolling){if(thisC.direction==1){thisC.act_move_up();}
else if(thisC.direction==2){thisC.act_move_right();}
else if(thisC.direction==3){thisC.act_move_down();}
else if(thisC.direction==4){thisC.act_move_left();}}}
this.time_timer=setInterval(act,this.time_dealy);}
js_rolling.prototype.pause_act=function(){if(this.time_dealy_pause){var thisC=this;var act=function(){thisC.resume();clearTimeout(thisC.time_timer_pause);thisC.time_timer_pause=null;}
if(this.time_timer_pause){clearTimeout(this.time_timer_pause);}
this.time_timer_pause=setTimeout(act,this.time_dealy_pause);this.is_rolling=false;}}
js_rolling.prototype.pause=function(){if(this.time_timer_pause){clearTimeout(this.time_timer_pause);}
this.is_rolling=false;}
js_rolling.prototype.resume=function(){if(!this.mouseover){this.is_rolling=true;}}
js_rolling.prototype.stop=function(){this.is_rolling=false;if(!this.time_timer){clearInterval(this.time_timer);}
this.time_timer=null}