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textarea 控制输入字符字节数(示例代码)

整理:jimmy2026/10/15浏览2次

简介按字符数控制：复制代码代码如下:

<div id="MyContent"><P><STRONG>按字符数控制：<BR></STRONG><U>复制代码</U> 代码如下:<BR><textarea name="gbContent"  style="width: 500px; height: 200px;"<BR>             onkeyup="if(this.value.length>2000) this.value=this.value.substr(0,2000)"<BR>             onkeydown="if(this.value.length>2000) this.value=this.value.substr(0,2000)"<BR>             onblur="if(this.value.length>2000) this.value=this.value.substr(0,2000)"<BR>             onpropertychange= "if(this.value.length>2000) this.value=this.value.substr(0,2000)"></textarea><BR><BR><STRONG>按字节数控制：<BR></STRONG><U>复制代码</U> 代码如下:<BR><textarea cols="50" id="description" name="userModel.description" rows="5"<BR>      onkeydown="key1=this.value;value1 = key1.replace(/[\u4e00-\u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)" <BR>      onkeyup="key1=this.value;value1 = key1.replace(/[\u4e00-\u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)"<BR>      onblur="key1=this.value;value1 = key1.replace(/[\u4e00-\u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)"  <BR>      onchange="key1=this.value;value1 = key1.replace(/[\u4e00-\u9fa5]/g,' ');if(value1.length>500) this.value=this.value.substr(0,500)"></textarea><BR></P></div>
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