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VALIDATE TEXTBOX USING JAVASCRIPT
[Javascript editor]
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HTML [Ctrl+Enter] - to run
Username:
Validate
CSS [Ctrl+Enter] - to run
Javascript [Ctrl+Enter] - to run
function validate(){ if (document.getElementById("txt_username").value == ""){ alert("Enter the username"); document.getElementById("txt_username").focus(); } else { alert("Everything Okay"); } }
OUTPUT
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Copyright © 2021 Knowledge walls, All rights reserved