|
<body>
最大数: 98765
<input type=text value='123456' name=tt onkeydown=numInputCheck(this,98765)>
具体功能自己测试咯 :)
</body>
<script>
//只能输入小于最大数且是正整数的脚本
function numInputCheck(o,m){
var d;
if(',48,49,50,51,52,53,54,55,56,57,96,97,98,99,100,101,102,103,104,105,8,9,13,'.indexOf(',' + event.keyCode + ',')==-1){
event.returnValue=null;
}
if(m!=null){
d = event.keyCode >= 96 ? event.keyCode - 48 : event.keyCode;
if(document.selection.createRange().duplicate().text=='' && (o.value+String.fromCharCode(d))>m){
event.returnValue=null;o.value=m;
}else if(',8,9,13,'.indexOf(',' + d + ',')==-1&&document.selection.createRange().duplicate().text==''&&o.value.indexOf('0')==0){
o.value='';
}
}
}
</script> |
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