正則限制文本輸入

2020-01-20 22:30:04

字體：大中小

來源：轉載

供稿：網友

<P><script> function regInput(reg) {  var srcElem = event.srcElement  var oSel = document.selection.createRange()  var srcRange = srcElem.createTextRange()  oSel.setEndPoint("StartToStart", srcRange)  var num = oSel.text + String.fromCharCode(event.keyCode) + srcRange.text.substr(oSel.text.length)  event.returnValue = reg.test(num) }</script></P><P>小寫英文：<xmp style="display:inline"> </xmp><input id=test onkeypress="regInput(/^[a-z]*$/)" style="ime-mode:Disabled">大寫英文：<xmp style="display:inline"> </xmp><input id=test onkeypress="regInput(/^[A-Z]*$/)" style="ime-mode:Disabled">任意數字：<xmp style="display:inline"> </xmp><input id=test onkeypress="regInput(/^[0-9]*$/)" style="ime-mode:Disabled">限2位小數：<xmp style="display:inline"> </xmp><input id=test onkeypress="regInput(/^/d*/.?/d{0,2}$/)" style="ime-mode:Disabled"> 如: 123.12日　  期：<xmp style="display:inline"> </xmp><input id=test onkeypress="regInput(/^/d{1,4}([-//](/d{1,2}([-//](/d{1,2})?)?)?)?$/)" style="ime-mode:Disabled"> 如: 2002-9-29任意中文：<xmp style="display:inline"> </xmp><input onkeypress="regInput(/^$/)">部分英文：<xmp style="display:inline"> </xmp><input onkeypress="regInput(/^[a-e]*$/i)"  style="ime-mode:Disabled"> 范圍: a,b,c,d,e部分中文：<xmp style="display:inline"> </xmp><script language=javascript>function checkChinese(oldLength, obj){ var oTR = window.document.selection.createRange() oTR.moveStart("character", -1*(obj.value.length-oldLength)) oTR.text = oTR.text.replace(/[^一二三四五六七八九十]/g, "")}</script><input onkeypress="return false" onkeydown="setTimeout('checkChinese('+this.value.length+','+this.uniqueID+')', 1)"> 范圍: 一二三四五六七八九十</P><P> </P>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執行]

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