文本输入限制

< 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 >