要求将相关id的重复的去掉，一个是客户端一个后台程序把关。
以下是用js去重复id的实现代码。
例子：
复制代码 代码示例:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>js去重复id_www.jb200.com</title>
</head>
<body>
<script type="text/
javascript">
String.prototype.repeatOpt = function () {
var str = this + "",objStr = "";
for (var i = 0; i < this.length; i++) {
var s = str[i];
var newStr = str.replace(s, '');
var j = newStr.indexOf(s);
if (j == -1) {
objStr += s+",";
}
}
return objStr;
}
alert("1,2,2,3,4,4,5,6".repeatOpt());
</script>
</body>
</html>
常用代码：
复制代码 代码示例:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>js去除重复id</title>
<script type="text/javascript">
function $Obj(objname){
return document.getElementById(objname);
}
//供使用者调用
function trim(s){
return trimRight(trimLeft(s));
}
//去掉左边的空白
function trimLeft(s){
if(s == null) {
return "";
}
var whitespace = new String(" tnr");
var str = new String(s);
if (whitespace.indexOf(str.charAt(0)) != -1) {
var j=0, i = str.length;
while (j < i && whitespace.indexOf(str.charAt(j)) != -1){
j++;
}
str = str.substring(j, i);
}
return str;
}
//去掉右边的空白
function trimRight(s){
if(s == null) return "";
var whitespace = new String(" tnr");
var str = new String(s);
if (whitespace.indexOf(str.charAt(str.length-1)) != -1){
var i = str.length - 1;
while (i >= 0 && whitespace.indexOf(str.charAt(i)) != -1){
i--;
}
str = str.substring(0, i+1);
}
return str;
}
function doxgid()
{
document.form1.likeid.value = trim(document.form1.likeid.value.replace(new RegExp('，',"gm"),','));
document.form1.likeid.value = trim(document.form1.likeid.value.replace(new RegExp(' ',"gm"),','));
xgidcheck();
}
function xgidcheck(){
if(document.form1.likeid.value!=""){
var arr1 = unique(document.form1.likeid.value.split(","));
document.form1.likeid.value=arr1.join(",");
}
}
//去重复数组
function unique(data){
data = data || [];
var a = {};
len = data.length;
for (var i=0; i<len;i++){
var v = data[i];
if (typeof(a[v]) == 'undefined'){
a[v] = 1;
}
};
data.length=0;
for (var i in a){
data[data.length] = i;
}
return data;
}
//专题增强
function doxgid2(theitem)
{
var theform=$Obj(theitem);
theform.value = trim(theform.value.replace(new RegExp('，',"gm"),','));
theform.value = trim(theform.value.replace(new RegExp(' ',"gm"),','));
xgidcheck2(theform);
}
function xgidcheck2(theform){
if(theform.value!=""){
var arr1 = unique(theform.value.split(","));
theform.value=arr1.join(",");
}
}
</script>
</head>
<body>
<form name="form1">
实例一：
单表单验证
复制代码 代码示例:
<input name="likeid" type="text" id="likeid" size="60" onBlur="doxgid()" value="1,2,3,4,5,6,4,5,6">
实例二：多个表单验证
复制代码 代码示例:
<textarea name="jb51id" rows="3" id="jb51id" style="width:90%" onBlur="doxgid2('jb51id')">1,2,3,4,5,6,4,5,6</textarea>
先将鼠标定位在表单中，然后离开即可实现触发。
onBlur
</form>
</body>
</html>
