用JavaScript创建格式屏蔽
ZDNet软件频道 时间：2003-02-26 作者：Techmail 代码页 |
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<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!--
String.prototype.trim = function () {
return this.replace(/^s*/,
"").replace(/s*$/, "");
}
String.prototype.padL = function (nLength, sChar) {
var sreturn = this;
while (sreturn.length < nLength) {
sreturn = String(sChar) + sreturn;
}
return sreturn;
}
function date_onkeydown() {
if (window.event.srcElement.readOnly) return;
var key_code = window.event.keyCode;
var oElement = window.event.srcElement;
if (window.event.shiftKey && String.fromCharCode(key_code)
== "T") {
var d = new Date();
oElement.value =
String(d.getMonth() + 1).padL(2, "0") + "/" +
String(d.getDate()).padL(2, "0") + "/" +
d.getFullYear();
window.event.returnValue = 0;
}
if (!window.event.shiftKey &&
!window.event.ctrlKey && !window.event.altKey) {
if ((key_code > 47
&& key_code < 58) ||
(key_code > 95
&& key_code < 106)) {
if
(key_code > 95) key_code -= (95-47);
oElement.value
=
oElement.value.replace(/[mdy]/, String.fromCharCode(key_code));
}
if (key_code == 8) {
if
(!oElement.value.match(/^[mdy0-9]/[mdy0-9]/[mdy0-9]$/))
oElement.value
= "mm/dd/yyyy";
oElement.value
= oElement.value.replace(/([mdy/]*)[0-9]([mdy/]*)$/,
function
(, , ) {
var
idx = oElement.value.search(/([mdy/]*)[0-9]([mdy/]*)$/);
if
(idx >= 5) {
return
+ "y" + ;
}
else if (idx >= 2) {
return
+ "d" + ;
}
else {
return
+ "m" + ;
}
}
);
window.event.returnValue
= 0;
}
}
if (key_code != 9) {
event.returnValue = false;
}
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<FORM>
<INPUT TYPE="text" NAME="txtDate" ID="txtDate"
SIZE="10"
MAXLENGTH="10" onkeydown="date_onkeydown()"
VALUE="mm/dd/yyyy">
</FORM>
</BODY>
</HTML>
