var PLP_Filter=new Class({initialize:function(a){this.root_node=!a?document.getElement("body"):$(a);this.filter_class="cs_filter"},create:function(){if(this.root_node){var a=this.root_node.getElement("."+this.filter_class);if(!a){this.filter_node=new Element("div",{"class":this.filter_class});this.filter_node.inject(this.root_node)}}},remove:function(){if(this.filter_node){this.filter_node.dispose()}}});