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>