regular expression validator in java script

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hello to all
how can execute this regular expression validator
^[0-9]{0,9}(\.[0-9]{0,3})?$
by java script
i mean write function in java script exec
^[0-9]{0,9}(\.[0-9]{0,3})?$
and this function call by on change event like this
<input type="text" önchange="function name "/>

Posted 26-May-13 23:22pm

ahmed hussein khazal

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3 solutions

Solution 1

Hi
You can use the test() method available in javascript like this:

XML

<script>

function check(Cntrl)
{
var str=Cntrl.value;
//look for "Hello"
var patt=/^[0-9]{0,9}(\.[0-9]{0,3})?$/;

if(patt.test(str))
{
...
}
else
{
...
}
}
</script>

and in the html code:

<input type="text" önchange="check(this)"/>

Posted 26-May-13 23:46pm

Rai Pawan

Solution 2

C#

$("#myTextBox").bind("change", function(event) {

        var matches = ($(this).val()).match(/^[0-9]{0,9}(\.[0-9]{0,3})?$/);
    if (matches) {
        //do you logic here
    }else{//do you logic here

}

    });

Posted 26-May-13 23:49pm

siddharthrainit

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renish patel · Accepted Answer · 2013-05-27T00:10:00

XML

<script type="text/javascript">
function checkregex(){
var reg=/^[0-9]{0,9}(\.[0-9]{0,3})?$/;
if (document.myform.myinput.value.search(reg)==-1) //if match failed
alert("Please enter a valid number inside form")
}
</script>

<form name="myform">
<input type="text" name="myinput" size=15>
<input type="button" onClick="checkregex()" value="check">

</form>