添加 （1） onkeyup="limitLength(this.value,100,'名称','name')" (2) id="name" 或【struts标签】styleId="name" 注意：id名称和 attribute属性名称要一样
例子： <p> 或 <p><input type="text" name="explain" id="explain" onkeyup="limitLength(value,5,'语义说明','explain')" > <p>*/ <p>function limitLength(value, byteLength, title, attribute) { <BR> var newvalue = value.replace(/[^\x00-\xff]/g, "**"); <BR> var length = newvalue.length; <p> //当填写的字节数小于设置的字节数 <BR> if (length * 1 <=byteLength * 1){ <BR> return; <BR> } <BR> var limitDate = newvalue.substr(0, byteLength); <BR> var count = 0; <BR> var limitvalue = ""; <BR> for (var i = 0; i < limitDate.length; i++) { <BR> var flat = limitDate.substr(i, 1); <BR> if (flat == "*") { <BR> count++; <BR> } <BR> } <BR> var size = 0; <BR> var istar = newvalue.substr(byteLength * 1 - 1, 1);//校验点是否为“×” <p> //if 基点是×; 判断在基点内有×为偶数还是奇数 <BR> if (count % 2 == 0) { <BR> //当为偶数时 <BR> size = count / 2 + (byteLength * 1 - count); <BR> limitvalue = value.substr(0, size); <BR> } else { <BR> //当为奇数时 <BR> size = (count - 1) / 2 + (byteLength * 1 - count); <BR> limitvalue = value.substr(0, size); <BR> } <BR> alert(title + "最大输入" + byteLength + "个字节（相当于"+byteLength /2+"个汉字）！"); 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