/*
value: 值;
byteLength:數(shù)據(jù)庫(kù)字節(jié)長(zhǎng)度
title:字段中文名稱
attribute:屬性名稱
使用方法說(shuō)明:
添加 (1) onkeyup="limitLength(this.value,100,'名稱','name')"
(2) id="name" 或【struts標(biāo)簽】styleId="name"
注意:id名稱和 attribute屬性名稱要一樣
例子:<textarea name="explain" id="explain" onkeyup="limitLength(value,5,'語(yǔ)義說(shuō)明','explain')" >
或
<input type="text" name="explain" id="explain" onkeyup="limitLength(value,5,'語(yǔ)義說(shuō)明','explain')" >
*/
function limitLength(value, byteLength, title, attribute) {
var newvalue = value.replace(/[^/x00-/xff]/g, "**");
var length = newvalue.length;
//當(dāng)填寫(xiě)的字節(jié)數(shù)小于設(shè)置的字節(jié)數(shù)
if (length * 1 <=byteLength * 1){
return;
}
var limitDate = newvalue.substr(0, byteLength);
var count = 0;
var limitvalue = "";
for (var i = 0; i < limitDate.length; i++) {
var flat = limitDate.substr(i, 1);
if (flat == "*") {
count++;
}
}
var size = 0;
var istar = newvalue.substr(byteLength * 1 - 1, 1);//校驗(yàn)點(diǎn)是否為“×”
//if 基點(diǎn)是×; 判斷在基點(diǎn)內(nèi)有×為偶數(shù)還是奇數(shù)
if (count % 2 == 0) {
//當(dāng)為偶數(shù)時(shí)
size = count / 2 + (byteLength * 1 - count);
limitvalue = value.substr(0, size);