互联网页面浏览限制实现总结

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。

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>

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>

2.不能展开右键，不能全选，不能复制的实现

<body oncontextmenu="window.event.returnValue=false"

onkeypress="window.event.returnValue=false"

onkeydown="window.event.returnValue=false"

onkeyup="window.event.returnValue=false"

ondragstart="window.event.returnValue=false"

onselectstart="event.returnValue=false">

...

</body>

3.禁止页面正文内容被选取

<body oncontextmenu="return false" ondragstart="return false"

onselectstart ="return false" onselect="document.selection.empty()"

oncopy="document.selection.empty()" onbeforecopy="return

false"onmouseup="document.selection.empty()">

4.避免别人把网页放在框架中

5.禁示查看源代码

</frameset>

6.关闭输入法

7.禁止图片下载

在<body......>这里的最后加入：

oncontextmenu="return false" ondragstart="return false" onselectstart="return

false" scroll="auto"

8.禁止缓存

在HEAD里加入：