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May 26th, 2018
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  1. function noBackSpace()
  2. {
  3. if(event.keyCode == 8 || event.keyCode == 46)
  4. {
  5. alert("No Back Space");
  6. return false;
  7. }
  8. }
  9.  
  10. <input type="text" name="txt" value="" onkeydown="return noBackSpace()">
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