extjs4 —— 为表单的field必填项加红星号

Ext.form.field.Base.prototype.initComponent = function(){    var me = this;    Ext.form.field.Base.superclass.initComponent.call(this);    me.subTplData = me.subTplData || {};    this.addEvents(        'focus',        'blur',        'specialkey'    );    // Init mixins    me.initLabelable();    me.initField();    // Default name to inputId    if (!me.name) {        me.name = me.getInputId();    }    if(this.allowBlank === false && this.fieldLabel){        this.fieldLabel += '<font color=red>*</font>';    }}