Welcome To Ask or Share your Answers For Others

javascript - 限制输入文本框：仅允许数字和小数点(Restricting input to textbox: allowing only numbers and decimal point)

Welcome To Ask or Share your Answers For Others

1 Reply

replyed Feb 24, 2021 by 深蓝 (71.8m points)

 <HTML> <HEAD> <SCRIPT language=Javascript> <!-- function isNumberKey(evt) { var charCode = (evt.which) ? evt.which : evt.keyCode; if (charCode != 46 && charCode > 31 && (charCode < 48 || charCode > 57)) return false; return true; } //--> </SCRIPT> </HEAD> <BODY> <INPUT id="txtChar" onkeypress="return isNumberKey(event)" type="text" name="txtChar"> </BODY> </HTML>

This really works!

(这确实有效！)

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…

...