多行文本框的maxlength属性
<PUBLIC:COMPONENT id="bhvMaxlength" urn="maf:MaxLength">
<PUBLIC:PROPERTY name="MaxLength" />
<PUBLIC:ATTACH event="onkeypress" handler="doKeypress" />
<PUBLIC:ATTACH event="onbeforepaste" handler="doBeforePaste" />
<PUBLIC:ATTACH event="onpaste" handler="doPaste" />
<SCRIPT language="JScript">
// Keep user from entering more than MaxLength characters
function doKeypress()
{
if(!isNaN(MaxLength))
{
MaxLength = parseInt(MaxLength);
var oTR = element.document.selection.createRange();
// Allow user to type character if at least one character is selected
if(oTR.text.length >= 1)
event.returnValue = true;
else
if(value.length > MaxLength-1)
event.returnValue = false;
}
}
// Cancel default behavior
function doBeforePaste()
{
if(!isNaN(MaxLength))
event.returnValue = false;
}
// Cancel default behavior and create a new paste routine
function doPaste()
{
if(!isNaN(MaxLength))
{
event.returnValue = false;
MaxLength = parseInt(MaxLength);
var oTR = element.document.selection.createRange();
var iInsertLength = MaxLength - value.length + oTR.text.length;
var sData = window.clipboardData.getData("Text").substr(0,iInsertLength);
oTR.text = sData;
}
}
</SCRIPT>
</PUBLIC:COMPONENT>
<PUBLIC:PROPERTY name="MaxLength" />
<PUBLIC:ATTACH event="onkeypress" handler="doKeypress" />
<PUBLIC:ATTACH event="onbeforepaste" handler="doBeforePaste" />
<PUBLIC:ATTACH event="onpaste" handler="doPaste" />
<SCRIPT language="JScript">
// Keep user from entering more than MaxLength characters
function doKeypress()
{
if(!isNaN(MaxLength))
{
MaxLength = parseInt(MaxLength);
var oTR = element.document.selection.createRange();
// Allow user to type character if at least one character is selected
if(oTR.text.length >= 1)
event.returnValue = true;
else
if(value.length > MaxLength-1)
event.returnValue = false;
}
}
// Cancel default behavior
function doBeforePaste()
{
if(!isNaN(MaxLength))
event.returnValue = false;
}
// Cancel default behavior and create a new paste routine
function doPaste()
{
if(!isNaN(MaxLength))
{
event.returnValue = false;
MaxLength = parseInt(MaxLength);
var oTR = element.document.selection.createRange();
var iInsertLength = MaxLength - value.length + oTR.text.length;
var sData = window.clipboardData.getData("Text").substr(0,iInsertLength);
oTR.text = sData;
}
}
</SCRIPT>
</PUBLIC:COMPONENT>