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互联网页面浏览限制实现总结
http://www.21tx.com 2005年07月14日 不祥

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1.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>

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<br>



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