javascript 各种禁用

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)

}

小写英文：

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

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

style="ime-mode:Disabled">

大写英文：

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

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

style="ime-mode:Disabled">

任意数字：

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

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

style="ime-mode:Disabled">

限2位小数：

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

日　 期：

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

任意中文：

onpaste = "return regInput(this, /^[\u4E00-\u9FA5]*$/, 

window.clipboardData.getData('Text'))"

ondrop = "return regInput(this, /^[\u4E00-\u9FA5]*$/, 

event.dataTransfer.getData('Text'))">

部分英文：

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

部分中文：

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, "")

}

"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

2.不能展开右键，不能全选，不能复制的实现

onkeypress="window.event.returnvalue=false" 

onkeydown="window.event.returnvalue=false" 

onkeyup="window.event.returnvalue=false" 

ondragstart="window.event.returnvalue=false" 

onselectstart="event.returnvalue=false">

... 

3.禁止页面正文内容被选取

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