2000) this.value=this.value.substr(0,2000)" onkeydown="if(this.value.length>2000) this.value=this.value.substr(0,2000)" onblur="if">
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textarea控制输入字符字节数(示例代码)_javascript技巧
按字符数控制：
代码如下:
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)">
按字节数控制：
代码如下:
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)">
