修复IE11下兼容问题

src/swift/SWFPage2.js

@@ -459,7 +459,8 @@ class SNDBIC extends Component{
         this.state = {snd_bic:props.snd_bic,err_msg:this.props.err_msg}
     }
     onChange = val=>{
-        
+        if((!val && !this.state.snd_bic) || val == this.state.snd_bic)
+            return 
         let err_msg = validateRCV_BIC(val)
         
         this.props.onChange(val,err_msg)
@@ -493,7 +494,8 @@ class RCVBIC extends Component{
         this.state = {rcv_bic:props.rcv_bic,err_msg:this.props.err_msg}
     }
     onChange = val=>{
-        
+        if((!val && !this.state.rcv_bic) || val == this.state.rcv_bic)
+            return 
         let err_msg = validateRCV_BIC(val)
         
         this.props.onChange(val,err_msg)

src/swift/Tags/ZTextArea.js

@@ -10,6 +10,11 @@ export default class ZTextArea extends Component
     {
         const rows = this.props.maxLength/this.props.cols
         
+        let nval = e.target.value
+        let oldval = this.props.value
+        if((!oldval && ! nval) || nval== oldval)
+            return
+
         replace2(this.eibs.refs.input,e.nativeEvent,rows,this.props.cols,this.props.value)
         
         this.props.onChange && this.props.onChange(e)