正则表达式和Javascript限制文本框输入指定内容

数字限制：

<script>

function regInput(obj, reg, inputStr)

{

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>

C#TextBox控件中加数字限制

TextBox1.Attributes.Add("onkeypress","return regInput(this,/^[0-9]*$/,String.fromCharCode(event.keyCode));");

TextBox1.Attributes.Add("onpaste","return regInput(this,/^[0-9]*$/,window.clipboardData.getData('Text'));");

TextBox1.Attributes.Add("ondrop","return regInput(this, /^[0-9]*$/, event.dataTransfer.getData('Text'));");

TextBox1.Attributes.Add("style","ime-mode:Disabled");

小写英文：<xmp style= "display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^[a-z]*$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^[a-z]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[a-z]*$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled"

><br>

大写英文：<xmp style= "display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^[A-Z]*$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^[A-Z]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[A-Z]*$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled">

<br>

任意数字：<xmp style="display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^[0-9]*$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^[0-9]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[0-9]*$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled"

><br>

限2位小数：<xmp style="display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^/d*/.?/d{0,2}$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^/d*/.?/d{0,2}$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^/d*/.?/d{0,2}$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled"

> 如: 123.12<br>

日　 期：<xmp style="display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^/d{1,4}([-//](/d{1,2}([-//](/d{1,2})?)?)?)?$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^/d{1,4}([-//](/d{1,2}([-//](/d{1,2})?)?)?)?$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^/d{1,4}([-//](/d{1,2}([-//](/d{1,2})?)?)?)?$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled"

> 如: 2002-9-29<br>

任意中文：<xmp style="display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^[/u4E00-/u9FA5]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[/u4E00-/u9FA5]*$/, event.dataTransfer.getData('Text'))"

><br>

部分英文：<xmp style="display:inline"> </xmp>

<input onkeypress = "return regInput(this, /^[a-e]*$/, String.fromCharCode(event.keyCode))"

onpaste = "return regInput(this, /^[a-e]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[a-e]*$/, event.dataTransfer.getData('Text'))"

style="ime-mode:Disabled"

> 范围: a,b,c,d,e<br>

部分中文：<xmp style="display:inline"> </xmp>

<script language=javascript>

function checkChinese(oldLength, obj)

{

var oTR = window.document.selection.createRange()

var reg = /[^一二三四五六七八九十]/g

oTR.moveStart("character", -1*(obj.value.length-oldLength))

oTR.text = oTR.text.replace(reg, "")

}

</script>

<input onkeypress="return false" onkeydown="setTimeout('checkChinese('+this.value.length+','+this.uniqueID+')', 1)"

onpaste = "return regInput(this, /^[一二三四五六七八九十]*$/, window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[一二三四五六七八九十]*$/, event.dataTransfer.getData('Text'))"

> 范围: 一二三四五六七八九十