JS控制文本框只能输入整数或带一位小数的浮点数
<html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title>无标题页</title> <script type="text/javascript" language="javascript"> //控制文本框只能输入整数或带一位小数的浮点数 function regInput(obj, inputStr) { var reg=/^\d*\.?\d{0,1}$/; var docSel = document.selection.createRange() if (docSel.parentElement().tagName != "INPUT") return false oSel = docSel.duplicate() oSel.text = "" var srcRange = obj.createTextRange() oSel.setEndPoint("StartToStart", srcRange) var str = oSel.text + inputStr + srcRange.text.substr(oSel.text.length) return reg.test(str) } </script></head><body> <form id="form1" runat="server"> 测试html控件: <input onkeypress="return regInput(this,String.fromCharCode(event.keyCode))" onpaste="return regInput(this,window.clipboardData.getData('Text'))" ondrop="return regInput(this,event.dataTransfer.getData('Text'))"> </form></body></html>?