js字符串去重复id的实现代码

时间:2020-05-13 人气:0

我经常用的代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>js去除重复id</title>

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(" \t\n\r");

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(" \t\n\r");

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>

实例一：

单独的一个表单验证

实例二：多个表单验证

先将鼠标定位在表单里面，然后离开就可以触发了。

onBlur

</form>

</body>

</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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