extjs4.x two formfield plus

		                title:'解凍/支付審覈',
		                autoScroll :true,
		                frame:true,
		                layout: {
				            type: 'vbox',
				            align: 'stretch'  
				        },
		                border:0,
		                defaultType:'numberfield',
		                items: [{
			            	xtype     : 'textareafield',
					        grow      : true,
					        name      : 'feedback',
					        fieldLabel: '審覈意見',
					        labelWidth: 100,
					        allowBlank: false,
					        anchor    : '100%'
		                },{
		                    fieldLabel: '支付金額',
		                    name      : 'payMoney',
		                    width	  : 100,
		                    total:'',
		                    ref:'payMoney',
		                    hidden    : !isNeedPay,
		                    listeners:{
		                    	change:function(view,newValue){
		                    		var unfreezeMoney = view.ownerCt.down('numberfield[ref=unfreezeMoney]');
		                    		var price = view.ownerCt.ownerCt.ownerCt.ownerCt
		                    		   .down('freezeInfo[ref=freezeInfo]')
		                    		   .down('displayfield[name=totalFreezeAmount]').price;
		                    	    var um = unfreezeMoney.getValue();
		                    	    view.setMaxValue(parseInt(price)-um);
		                    	}
		                    }
		                }, {
		                    fieldLabel: '解凍金額',
		                    total:0,
		                    name: 'unfreezeMoney',
		                    ref:'unfreezeMoney',
		                    width	  : 100,
		                    listeners:{
		                    	change:function(view,newValue){
		                    		var payMoney = view.ownerCt.down('numberfield[ref=payMoney]');
		                    		var price = view.ownerCt.ownerCt.ownerCt.ownerCt
		                    		   .down('freezeInfo[ref=freezeInfo]')
		                    		   .down('displayfield[name=totalFreezeAmount]').price;
		                    	    var um = payMoney.getValue();
		                    	    view.setMaxValue(parseInt(price)-um);
		                    	}
		                    }
			            }],
			            listeners:{
			            	afterrender:function(view){
			            		var payMoney = view.down('numberfield[ref=payMoney]');
			            		var unfreezeMoney = view.down('numberfield[ref=unfreezeMoney]');
			            	    var freezeInfo = view.ownerCt.ownerCt.ownerCt.down('freezeInfo[ref=freezeInfo]');
			            	    var price =freezeInfo.down('displayfield[name=totalFreezeAmount]').price;
			            	    payMoney.total = price;
			            	    freezeInfo.total = price;
			            	    if('解凍'== operateType){
			            	    	unfreezeMoney.setValue(price);
			            	    	unfreezeMoney.setReadOnly(true);
			            	    }
			            	    else{
			            	    	payMoney.setMaxValue(price);
			            	    	unfreezeMoney.setMaxValue(price);
			            	    }
			            	}
			            }