How To Enable or Disable a Controls Like Button, Textbox, Checkbox Using JavaScript in C# Asp.Net
Program:
.Aspx File:
Program:
.Aspx File:
| <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Enable or Disable a control</title> <script language="javascript" type="text/javascript"> //function to enable button if two textboxes contains text function SetButtonStatus() { var txt = document.getElementById('txtfirst'); //Condition to check whether user enters text in two textboxes or not if (txt.value.length >= 1) document.getElementById('btnButton').disabled = false; else document.getElementById('btnButton').disabled = true; } </script> </head> <body> <div> <b>Enter Text:</b><input type="text" id="txtfirst" onkeyup="SetButtonStatus(this,'btnButton')"/> <input type="button" id="btnButton" value="Button" disabled="disabled" /> </div> </body> </html> |
Live Demo:
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Enter Text:
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