JS TextArea文字列長制限コードセット

 
  
 
  
 
  
 
  <br/><input type="text" id="b2"/> 
  <br/><script type="text/javascript"> 
  <br>textAreaLimit("t",{lastMsgLabel:"b2"}) 
  <br>function textAreaLimit(area,op){ 
  <br>var defaultOp = { 
  <br>maxLength:10 //     
  <br>, IsNumber:false //      
  <br>, lastMsgLabel:null //          Input 
  <br>, msg:"     {0}   " 
  <br>, errorMsg:"          " 
  <br>}; 
  <br>var label; 
  <br>if(typeof area == "string"){ 
  <br>area = document.getElementById(area); 
  <br>} 
  <br>if(!area){ 
  <br>return; 
  <br>} 
  <br>for(var i in op){ 
  <br>defaultOp[i] = op[i]; 
  <br>} 
  <br>if(defaultOp.lastMsgLabel){ 
  <br>if(typeof defaultOp.lastMsgLabel == "string"){ 
  <br>label = document.getElementById(defaultOp.lastMsgLabel); 
  <br>} 
  <br>} 
  <br>if(defaultOp.IsNumber){ 
  <br>area.style.imeMode="Disabled";//IE 
  <br>area.onkeydown = function(){ 
  <br>return event.keyCode != 229; 
  <br>} 
  <br>} 
  <br>area.onkeyup = function(){ 
  <br>if(defaultOp.IsNumber){ 
  <br>this.value = this.value.replace(/\D/g,"");//IE    
  <br>} 
  <br>if(this.value.length > defaultOp.maxLength){ 
  <br>//------------------------------------------------------------------------------- 
  <br>//  ① 
  <br>this.disabled = "disabled"; 
  <br>this.value = this.value.slice(0,defaultOp.maxLength); 
  <br>this.removeAttribute("disabled"); 
  <br>this.focus(); 
  <br>//  ② 
  <br>//  
  <br>//alert(defaultOp.errorMsg); 
  <br>//this.value = this.value.slice(0,defaultOp.maxLength); 
  <br>//------------------------------------------------------------------------------- 
  <br>} 
  <br>if(label){ 
  <br>label.value = defaultOp.msg.replace(/\{0\}/,defaultOp.maxLength -this.value.length); 
  <br>} 
  <br>} 
  <br>} 
  <br></script> 
  <br/> 
  <br/> 
  <br/> 
 </code></pre> 
 <br/>      +      BUG            。 
 <br/>             。 
 <br/>               ，    ②,        ①。 
 <div class="clearfix"> 
  <span id="art_bot" class="jbTestPos"/> 
 </div> 
</div>
                            </div>
                        </div>