<html>
<head>
<title>Number Only</title>
</head>
<body>
<form>
<input type="text" id="txt1" validChars="0123456789" onkeypress="userMethod();">
</form>
<script type="text/javascript">
var oText = document.getElementById("txt1");
// oText.onkeypress = userMethod;
function userMethod(e){//这里改为 var userMethod = function(e){
e = e || window.event;
var keyCode = e.keyCode || e.charCode;
var s = String.fromCharCode(keyCode);
if(oText.getAttribute("validChars").indexOf(s) < 0){
if(e && e.preventDefault){
e.preventDefault();
}else{
e.returnValue = false;
}
}
};
</script>
</body>
</html>重发下代码,请问是什么问题?(请回答得比较有技术含量点)
<head>
<title>Number Only</title>
</head>
<body>
<form>
<input type="text" id="txt1" validChars="0123456789" onkeypress="userMethod();">
</form>
<script type="text/javascript">
var oText = document.getElementById("txt1");
// oText.onkeypress = userMethod;
function userMethod(e){//这里改为 var userMethod = function(e){
e = e || window.event;
var keyCode = e.keyCode || e.charCode;
var s = String.fromCharCode(keyCode);
if(oText.getAttribute("validChars").indexOf(s) < 0){
if(e && e.preventDefault){
e.preventDefault();
}else{
e.returnValue = false;
}
}
};
</script>
</body>
</html>重发下代码,请问是什么问题?(请回答得比较有技术含量点)
<html>
<head>
<title>Number Only</title>
</head>
<body>
<form>
<input type="text" id="txt1" validChars="0123456789" onkeypress="userMethod(event);">
</form>
<script type="text/javascript">
var oText = document.getElementById("txt1");
// oText.onkeypress = userMethod;
function userMethod(event){//这里改为 var userMethod = function(e){ e = e || window.event;
alert(event.keyCode);
alert(event.charCode);
var keyCode = event.keyCode || event.charCode;
var s = String.fromCharCode(keyCode);
if(oText.getAttribute("validChars").indexOf(s) < 0){
if(event && event.preventDefault){
event.preventDefault();
}else{
event.returnValue = false;
}
}
};
</script>
</body>
ff没有window.event