Ext.form.FieldSet=Ext.extend(Ext.Panel,{baseCls:"x-fieldset",layout:"form",animCollapse:false,onRender:function(b,a){if(!this.el){this.el=document.createElement("fieldset");this.el.id=this.id;if(this.title||this.header||this.checkboxToggle){this.el.appendChild(document.createElement("legend")).className="x-fieldset-header"}}Ext.form.FieldSet.superclass.onRender.call(this,b,a);if(this.checkboxToggle){var c=typeof this.checkboxToggle=="object"?this.checkboxToggle:{tag:"input",type:"checkbox",name:this.checkboxName||this.id+"-checkbox"};this.checkbox=this.header.insertFirst(c);this.checkbox.dom.checked=!this.collapsed;this.checkbox.on("click",this.onCheckClick,this)}},onCollapse:function(a,b){if(this.checkbox){this.checkbox.dom.checked=false}Ext.form.FieldSet.superclass.onCollapse.call(this,a,b)},onExpand:function(a,b){if(this.checkbox){this.checkbox.dom.checked=true}Ext.form.FieldSet.superclass.onExpand.call(this,a,b)},onCheckClick:function(){this[this.checkbox.dom.checked?"expand":"collapse"]()},beforeDestroy:function(){if(this.checkbox){this.checkbox.un("click",this.onCheckClick,this)}Ext.form.FieldSet.superclass.beforeDestroy.call(this)}});Ext.reg("fieldset",Ext.form.FieldSet);