文本框输入限制

实现限制输入大、小写英文，数字，浮点小数，日期，中文，部分英文，部分中文等众多功能。直接加入到html代码中即可使用。

<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>
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>