How to verify "Contains" using JavaScript

Question

Possible Duplicate:
JavaScript: string contains

In the below code I have to check whether the textbox contains @ and .. I tried writing the below code which is not working. Anybody please do provide me with the correct syntax.

    function emailval(objval) {
        if (obj.value.contains("@") && obj.value.contains(".")) {
            document.getElementById(mid).style.backgroundColor = "#BDD470";
        }
        else {
            document.getElementById(mid).style.backgroundColor = "#CC0505";
        }
    }

</script>

Enter text (Enter your email):
<form id="form1" runat="server">
<br />
<br />
<asp:TextBox ID="TextBox1" onkeyup="return emailval(this)" runat="server"></asp:TextBox>
<br />
<br />
</form>

-1 The statement "not working" is "a useless statement". Please take time to debug/explain the problem more. I suspect it is because "one can't apply the () operator to the undefined value". — , Aug 30 '11 at 18:27
There is no contains in javascript. You can add your own - this SO thread answers your question. http://stackoverflow.com/questions/1789945/javascript-string-contains — mrtsherman, Aug 30 '11 at 18:28
The function parameter name is `objVal` and you are using `obj` in the function. Change the parameter anem to `obj`. — Chandu, Aug 30 '11 at 18:28
`objval` is your parameter, yet you're referencing `obj.val`? — Brad Christie, Aug 30 '11 at 18:28
Duplicate of (most of) these: http://stackoverflow.com/search?q=javascript+string+contains — Felix Kling, Aug 30 '11 at 18:30

score 2 · Answer 1 · answered Aug 30 '11 at 18:28

2

For native string contains use indexOf:

 str.indexOf('@') !== -1; // str contains '@' true

answered Aug 30 '11 at 18:28

Joe

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score 1 · Accepted Answer · answered Aug 30 '11 at 18:29

1

You need -

if (obj.value.indexOf("@") != -1 && obj.value.indexOf(".") != -1)

answered Aug 30 '11 at 18:29

ipr101

24,096
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score 1 · Answer 3 · answered Aug 30 '11 at 18:32

1

or the regex way... just because it's there

if(obj.value.match(/[.].*[@]|[@].*[.]/))

answered Aug 30 '11 at 18:32

Joseph Marikle

76,418
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How to verify "Contains" using JavaScript

3 Answers3