TextBox validation using JQuery / Javascript

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Hi ,

I have five text boxes and need to validate values in each text box based on previous textboxes, like .., textbox3 should be greaer than textbox2 ,if textbox2 is null then textbox3 should be greater than textbox1. Is there any way to do this in javascript or jquery, . Please guide thru this logic,,
thanks in advance.

Posted 24-Aug-13 5:15am

ajithk444

Updated 5-May-17 2:49am

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Mohibur Rashid 24-Aug-13 11:35am

there is way to do it, but did you try anything at all?

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Mahesh Bailwal · Answer 1 · 2013-08-24T06:42:00

Below JavaScript sample code may help.

<html>
<head>
    <title></title>
</head>
<body>
    <input type="text" id="textbox1" />
    <br />
    
    <br />
    <input type="text" id="textbox3" />
    <br />
    <input type="text" id="textbox4" />
    <input type="button" value="Validate" onclick="ValidateTextBox()" />
    <script>
    function ValidateTextBox() {
        var lastTextBox = null;
        var textBoxCount =0;
        for (var i = 2; i <= 4; i++) {
            lastTextBoxid = "textbox" + (i - 1);
            if (document.getElementById(lastTextBoxid) != null) {
                lastTextBox = document.getElementById(lastTextBoxid);
                textBoxCount++;
            }
            if (document.getElementById("textbox" + i) != null) {
                var thisTextBox = document.getElementById("textbox" + i);
                if (parseFloat(lastTextBox.value) > parseFloat(thisTextBox.value)) {
                alert("Text Box " + (textBoxCount+1) + " value should be grater than TextBox" + (textBoxCount));
                return false;
                }
            }

        }


    }

    </script>
</body>
</html>