JS输入限制

<title>JS输入限制，不符要求不能输入的代码</title><script>function regInput(obj, reg, inputStr){var docSel= document.selection.createRange()if (docSel.parentElement().tagName != "INPUT")return falseoSel = 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><inputonkeypress= "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]*$/,event.dataTransfer.getData('Text'))"style="ime-mode:Disabled">大写英文：<xmp style= "display:inline"></xmp><inputonkeypress= "return regInput(this,/^[A-Z]*$/,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">任意数字：<xmp style="display:inline"></xmp><inputonkeypress= "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]*$/,event.dataTransfer.getData('Text'))"style="ime-mode:Disabled">限2位小数：<xmp style="display:inline"></xmp><inputonkeypress= "return regInput(this,/^\d*\.?\d{0,2}$/,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日　  期：<xmp style="display:inline"></xmp><inputonkeypress= "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})?)?)?)?$/,event.dataTransfer.getData('Text'))"style="ime-mode:Disabled"> 如: 2002-9-29任意中文：<xmp style="display:inline"></xmp><inputonkeypress= "return regInput(this,/^$/,String.fromCharCode(event.keyCode))"onpaste= "return regInput(this,/^[\u4E00-\u9FA5]*$/,window.clipboardData.getData('Text'))"ondrop= "return regInput(this,/^[\u4E00-\u9FA5]*$/,event.dataTransfer.getData('Text'))">部分英文：<xmp style="display:inline"></xmp><inputonkeypress= "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]*$/,event.dataTransfer.getData('Text'))"style="ime-mode:Disabled"> 范围: a,b,c,d,e部分中文：<xmp style="display:inline"></xmp><script language=javascript>function checkChinese(oldLength, obj){var oTR = window.document.selection.createRange()var reg = /[^一二三四五六七八九十]/goTR.moveStart("character", -1*(obj.value.length-oldLength))oTR.text = oTR.text.replace(reg, "")}</script><inputonkeypress="return false" onkeydown="setTimeout('checkChinese('+this.value.length+','+this.uniqueID+')', 1)"onpaste= "return regInput(this,/^[一二三四五六七八九十]*$/,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

转自：http://www.codefans.net/jscss/code/30.shtml