textarea 控制輸入字元位元組數(範例程式碼)_javascript技巧

以字元數控制：

複製程式碼

複製程式碼

複製程式碼

複製程式碼

複製程式碼🎜>       .substr(0,2000)"<span>             onkeydown="if(this.value.length>2000) this.value=this.value.substr(0,20000)"2000) this.value=this.value.substr(0,2000)"<a style="CURSOR: pointer" data="95438" class="copybut" id="copybut95438" onclick="doCopy('code95438')">             onpropertychange= "if(this.value.length>2000) 0.value=0. "></a></span>以位元組數控制：

複製程式碼

代碼如下:  . "key1=this.value;value1 = key1.replace(/[u4e00-u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)" onkeyup="key1=this.value;value1 = key1.replace(/[u4e00-u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)"      onblur="key1=this.value;value1 = key1.replace(/[u4e00-u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,5000) "        onchange="key1=this.value;value1 = key1.replace(/[u4e00-u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(value1.length>500) this.value=this.value.substr(value1. 0,500)">