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JS Check the page has no duplicate ID on the implementation code

Source: Internet
Author: User
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Sometimes we need to check whether a page with a duplicate ID, the general ID is unique, but also convenient control, then you can refer to the following code

Method One:

Copy Code code as follows:


<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >


<HTML>


<HEAD>


<TITLE> New Document </TITLE>


<script type= "Text/javascript" >


window.onload = function () {


var tags = document.getelementsbytagname ("*"),


count = tags.length, time, ret = {}, id;


time = new Date ();


for (var i = 0; i < count; i++) {


id = tags[i].id;


if (ID) {


if (Ret[id]) {


alert (id + '/n Time: ' + (new Date ()-time);


return;


}else{


Ret[id] = true;


                }


            }


}


alert ("No same ID found");


    }


</script>


</HEAD>


<BODY>


<script type= "Text/javascript" >


(function () {


var html = [], rnd = parseint (Math.random () * 1000);


for (var i = 0; i < 1000; i++) {


Html.push ("<div id= ' a" + i + "' >" + i + "</div>");


        };


//insertion of a random ID in a random position


i = parseint (Math.random () * 1000);


Html[i] = Html[i] + ("<div id= ' a" + rnd + "' >" + rnd + "</div>");


document.write (Html.join (""));


    })();


</script>


</BODY>


</HTML>

Method Two:

Copy Code code as follows:




<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >


<HTML>


<HEAD>


<TITLE> New Document </TITLE>


<script type= "Text/javascript" >


function Creatediv () {


var html = [], id;


for (var i = 0; i < i++) {


id = "divID" + parseint (math.random () * 10000);


Html.push ("<div id= '" + ID + "' >" + ID + "</div>");


        }


Document.body.innerHTML = Html.join ("");


    }


window.onload = function () {


Creatediv ();





var OID = {}, result = {}, arr = [],


tags = document.getelementsbytagname ("*");


for (var i = 0, id; i < tags.length; i++) {


id = tags[i].id;


if (ID) {


Oid[id] = Oid[id]? Oid[id] + 1:1;


if (Oid[id] > 1) {


Result[id] = id + "" + Oid[id];}} for (var o to result) {


Arr.push (Result[o]);


        }


Alert (Arr.join ("T"));


    };


</script>


</HEAD>


<BODY>


</BODY>


</HTML>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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