Javascript 更改事件不起作用
由于javascript日历，to[0]的值正在动态更改。在这段代码中，变更事件不起作用，我不知道…为什么会这样？？？ Jquery代码是：Javascript 更改事件不起作用,javascript,jquery,html,Javascript,Jquery,Html,由于javascript日历，to[0]的值正在动态更改。在这段代码中，变更事件不起作用，我不知道…为什么会这样？？？ Jquery代码是： $(document).ready(function() { $("input[name='to[0]']").change( function() { var b1 = $("input[name='to[0]']").val(); alert(b1); }); }); 此字段的HTML为： <td >
$(document).ready(function() {
$("input[name='to[0]']").change( function() {
var b1 = $("input[name='to[0]']").val();
alert(b1);
});
});
<td >
<input type="text" size="12" name="to[0]" value="To" readonly="readonly" />
<a class="datepicker" href="#"><img alt="Pick a date" src="js/date.gif" border="0" width="17" height="16" /></a>
</td>
var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";
var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');
var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
// these variables define the date formatting we're expecting and outputting.
// If you want to use a different format by default, change the defaultDateSeparator
// and defaultDateFormat variables either here or on your HTML page.
var defaultDateSeparator = "/"; // common values would be "/" or "."
var defaultDateFormat = "dMy" // valid values are "mdy", "dmy", and "ymd"
var dateSeparator = defaultDateSeparator;
var dateFormat = defaultDateFormat;
function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
{
var targetDateField = document.getElementsByName(dateFieldName).item(0);
// if we weren't told what node to display the datepicker beneath, just display it
// beneath the date field we're updating
if (!displayBelowThisObject)
displayBelowThisObject = targetDateField;
// if a date separator character was given, update the dateSeparator variable
if (dtSep)
dateSeparator = dtSep;
else
dateSeparator = defaultDateSeparator;
// if a date format was given, update the dateFormat variable
if (dtFormat)
dateFormat = dtFormat;
else
dateFormat = defaultDateFormat;
var x = displayBelowThisObject.offsetLeft;
var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;
// deal with elements inside tables and such
var parent = displayBelowThisObject;
while (parent.offsetParent) {
parent = parent.offsetParent;
x += parent.offsetLeft;
y += parent.offsetTop ;
}
drawDatePicker(targetDateField, x, y);
}
/**
Draw the datepicker object (which is just a table with calendar elements) at the
specified x and y coordinates, using the targetDateField object as the input tag
that will ultimately be populated with a date.
This function will normally be called by the displayDatePicker function.
*/
function drawDatePicker(targetDateField, x, y)
{
var dt = getFieldDate(targetDateField.value );
// the datepicker table will be drawn inside of a <div> with an ID defined by the
// global datePickerDivID variable. If such a div doesn't yet exist on the HTML
// document we're working with, add one.
if (!document.getElementById(datePickerDivID)) {
// don't use innerHTML to update the body, because it can cause global variables
// that are currently pointing to objects on the page to have bad references
//document.body.innerHTML += "<div id='" + datePickerDivID + "' class='dpDiv'></div>";
var newNode = document.createElement("div");
newNode.setAttribute("id", datePickerDivID);
newNode.setAttribute("class", "dpDiv");
newNode.setAttribute("style", "visibility: hidden;");
document.body.appendChild(newNode);
}
// move the datepicker div to the proper x,y coordinate and toggle the visiblity
var pickerDiv = document.getElementById(datePickerDivID);
pickerDiv.style.position = "absolute";
pickerDiv.style.left = x + "px";
pickerDiv.style.top = y + "px";
pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
pickerDiv.style.zIndex = 10000;
// draw the datepicker table
refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
}
/**
This is the function that actually draws the datepicker calendar.
*/
function refreshDatePicker(dateFieldName, year, month, day)
{
// if no arguments are passed, use today's date; otherwise, month and year
// are required (if a day is passed, it will be highlighted later)
var thisDay = new Date();
if ((month >= 0) && (year > 0)) {
thisDay = new Date(year, month, 1);
} else {
day = thisDay.getDate();
thisDay.setDate(1);
}
// the calendar will be drawn as a table
// you can customize the table elements with a global CSS style sheet,
// or by hardcoding style and formatting elements below
var crlf = "\r\n";
var TABLE = "<table cols=7 class='dpTable'>" + crlf;
var xTABLE = "</table>" + crlf;
var TR = "<tr class='dpTR'>";
var TR_title = "<tr class='dpTitleTR'>";
var TR_days = "<tr class='dpDayTR'>";
var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
var xTR = "</tr>" + crlf;
var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' "; // leave this tag open, because we'll be adding an onClick event
var TD_title = "<td colspan=5 class='dpTitleTD'>";
var TD_buttons = "<td class='dpButtonTD'>";
var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
var TD_days = "<td class='dpDayTD'>";
var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' "; // leave this tag open, because we'll be adding an onClick event
var xTD = "</td>" + crlf;
var DIV_title = "<div class='dpTitleText'>";
var DIV_selected = "<div class='dpDayHighlight'>";
var xDIV = "</div>";
// start generating the code for the calendar table
var html = TABLE;
// this is the title bar, which displays the month and the buttons to
// go back to a previous month or forward to the next month
html += TR_title;
html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "<") + xTD;
html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, ">") + xTD;
html += xTR;
// this is the row that indicates which day of the week we're on
html += TR_days;
for(i = 0; i < dayArrayShort.length; i++)
html += TD_days + dayArrayShort[i] + xTD;
html += xTR;
// now we'll start populating the table with days of the month
html += TR;
// first, the leading blanks
for (i = 0; i < thisDay.getDay(); i++)
html += TD + " " + xTD;
// now, the days of the month
do {
dayNum = thisDay.getDate();
TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
if (dayNum == day)
html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
else
html += TD + TD_onclick + dayNum + xTD;
// if this is a Saturday, start a new row
if (thisDay.getDay() == 6)
html += xTR + TR;
// increment the day
thisDay.setDate(thisDay.getDate() + 1);
} while (thisDay.getDate() > 1)
// fill in any trailing blanks
if (thisDay.getDay() > 0) {
for (i = 6; i > thisDay.getDay(); i--)
html += TD + " " + xTD;
}
html += xTR;
// add a button to allow the user to easily return to today, or close the calendar
var today = new Date();
var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
html += TR_todaybutton + TD_todaybutton;
html += "<button class='dpTodayButton' onClick='refreshDatePicker(\"" + dateFieldName + "\");'>this month</button> ";
// html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>close</button>";
html += xTD + xTR;
// and finally, close the table
html += xTABLE;
document.getElementById(datePickerDivID).innerHTML = html;
// add an "iFrame shim" to allow the datepicker to display above selection lists
adjustiFrame();
}
/**
Convenience function for writing the code for the buttons that bring us back or forward
a month.
*/
function getButtonCode(dateFieldName, dateVal, adjust, label)
{
var newMonth = (dateVal.getMonth () + adjust) % 12;
var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
if (newMonth < 0) {
newMonth += 12;
newYear += -1;
}
return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");'>" + label + "</button>";
}
/**
Convert a JavaScript Date object to a string, based on the dateFormat and dateSeparator
variables at the beginning of this script library.
*/
function getDateString(dateVal)
{//alert(dateVal );
var dayString = "00" + dateVal.getDate();
var monthString = "00" + (dateVal.getMonth()+1);
dayString = dayString.substring(dayString.length - 2);
monthString = monthString.substring(monthString.length - 2);
switch (dateFormat) {
case "dmy" :
return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
case "ymd" :
return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
case "mdy" :
return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
default :
return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
}
}
/**
Convert a string to a JavaScript Date object.
*/
function getFieldDate(dateString)
{
var dateVal;
var dArray;
var d, m, y;
try {
dArray = splitDateString(dateString);
if (dArray) {
switch (dateFormat) {
case "dmy" :
d = parseInt(dArray[0], 10);
m = parseInt(dArray[1], 10) - 1;
y = parseInt(dArray[2], 10);
break;
case "ymd" :
d = parseInt(dArray[2], 10);
m = parseInt(dArray[1], 10) - 1;
y = parseInt(dArray[0], 10);
break;
case "mdy" :
default :
d = parseInt(dArray[1], 10);
m = parseInt(dArray[0], 10) - 1;
y = parseInt(dArray[2], 10);
break;
}
dateVal = new Date(y, m, d);
} else if (dateString) {
dateVal = new Date(dateString);
} else {
dateVal = new Date();
}
} catch(e) {
dateVal = new Date();
}
return dateVal;
}
/**
Try to split a date string into an array of elements, using common date separators.
If the date is split, an array is returned; otherwise, we just return false.
*/
function splitDateString(dateString)
{
var dArray;
if (dateString.indexOf("/") >= 0)
dArray = dateString.split("/");
else if (dateString.indexOf(".") >= 0)
dArray = dateString.split(".");
else if (dateString.indexOf("-") >= 0)
dArray = dateString.split("-");
else if (dateString.indexOf("\\") >= 0)
dArray = dateString.split("\\");
else
dArray = false;
return dArray;
}
/**
Update the field with the given dateFieldName with the dateString that has been passed,
and hide the datepicker. If no dateString is passed, just close the datepicker without
changing the field value.
Also, if the page developer has defined a function called datePickerClosed anywhere on
the page or in an imported library, we will attempt to run that function with the updated
field as a parameter. This can be used for such things as date validation, setting default
values for related fields, etc. For example, you might have a function like this to validate
a start date field:
*/
function datePickerClosed(dateField)
{
var dateObj = getFieldDate(dateField.value);
var today = new Date();
today = new Date(today.getFullYear(), today.getMonth(), today.getDate());
if (dateField.name == "StartDate") {
if (dateObj < today) {
// if the date is before today, alert the user and display the datepicker again
alert("Please enter a date that is today or later");
dateField.value = "";
document.getElementById(datePickerDivID).style.visibility = "visible";
adjustiFrame();
} else {
// if the date is okay, set the EndDate field to 7 days after the StartDate
dateObj.setTime(dateObj.getTime() + (7 * 24 * 60 * 60 * 1000));
var endDateField = document.getElementsByName ("EndDate").item(0);
endDateField.value = getDateString(dateObj);
}
}
}
function updateDateField(dateFieldName, dateString)
{//alert('hi');
var x=dateString.split('-');
var month;
if(x[1]==01)
{
month=monthArrayMed[0];
}
else if(x[1]==02)
{
month=monthArrayMed[1];
}
else if(x[1]==03)
{
month=monthArrayMed[2];
}
else if(x[1]==04)
{
month=monthArrayMed[3];
}
else if(x[1]==05)
{
month=monthArrayMed[4];
}
else if(x[1]==06)
{
month=monthArrayMed[5];
}
else if(x[1]==07)
{
month=monthArrayMed[6];
}
else if(x[1]==08)
{
month=monthArrayMed[7];
}
else if(x[1]==09)
{
month=monthArrayMed[8];
}
else if(x[1]==10)
{
month=monthArrayMed[9];
}
else if(x[1]==11)
{
month=monthArrayMed[10];
}
else if(x[1]==12)
{
month=monthArrayMed[11];
}
dateString=x[0]+'-'+month+'-'+x[2];
var targetDateField = document.getElementsByName (dateFieldName).item(0);
if (dateString)
targetDateField.value = dateString;
var pickerDiv = document.getElementById(datePickerDivID);
pickerDiv.style.visibility = "hidden";
pickerDiv.style.display = "none";
adjustiFrame();
targetDateField.focus();
// after the datepicker has closed, optionally run a user-defined function called
// datePickerClosed, passing the field that was just updated as a parameter
// (note that this will only run if the user actually selected a date from the datepicker)
if ((dateString) && (typeof(datePickerClosed) == "function"))
{
datePickerClosed(targetDateField);
//alert(typeof(datePickerClosed));
}
//alert(typeof(datePickerClosed));
}
function adjustiFrame(pickerDiv, iFrameDiv)
{
// we know that Opera doesn't like something about this, so if we
// think we're using Opera, don't even try
var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
if (is_opera)
return;
// put a try/catch block around the whole thing, just in case
try {
if (!document.getElementById(iFrameDivID)) {
// don't use innerHTML to update the body, because it can cause global variables
// that are currently pointing to objects on the page to have bad references
//document.body.innerHTML += "<iframe id='" + iFrameDivID + "' src='javascript:false;' scrolling='no' frameborder='0'>";
var newNode = document.createElement("iFrame");
newNode.setAttribute("id", iFrameDivID);
newNode.setAttribute("src", "javascript:false;");
newNode.setAttribute("scrolling", "no");
newNode.setAttribute ("frameborder", "0");
document.body.appendChild(newNode);
}
if (!pickerDiv)
pickerDiv = document.getElementById(datePickerDivID);
if (!iFrameDiv)
iFrameDiv = document.getElementById(iFrameDivID);
try {
iFrameDiv.style.position = "absolute";
iFrameDiv.style.width = pickerDiv.offsetWidth;
iFrameDiv.style.height = pickerDiv.offsetHeight ;
iFrameDiv.style.top = pickerDiv.style.top;
iFrameDiv.style.left = pickerDiv.style.left;
iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
iFrameDiv.style.visibility = pickerDiv.style.visibility ;
iFrameDiv.style.display = pickerDiv.style.display;
} catch(e) {
}
} catch (ee) {
}
}
var datePickerDivID=“datepicker”；
var iFrameDivID=“datepickeriframe”；
var dayArrayShort=新数组（'Su'，'Mo'，'Tu'，'We'，'Th'，'Fr'，'Sa'）；
var dayArrayMed=新数组（'Sun'，'Mon'，'Tue'，'Wed'，'Thu'，'Fri'，'Sat'）；
var dayArrayLong=新数组（“星期日”、“星期一”、“星期二”、“星期三”、“星期四”、“星期五”、“星期六”）；
var monthArrayShort=新数组（“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”）；
var monthArrayMed=新数组（“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”）；
var monthArrayLong=新数组（“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”）；
//这些变量定义了我们期望和输出的日期格式。
//如果希望在默认情况下使用其他格式，请更改defaultDateSeparator
//和defaultDateFormat变量在此处或HTML页面上。
var defaultDateSeparator=“/”；//常用值为“/”或“.”
var defaultDateFormat=“dMy”//有效值为“mdy”、“dMy”和“ymd”
var dateSeparator=defaultDateSeparator；
var dateFormat=defaultDateFormat；
函数displayDatePicker（dateFieldName，displayBelowThisObject，dtFormat，dtSep）
{
var targetDateField=document.getElementsByName（dateFieldName）.item（0）；
//如果我们没有被告知要在下面显示日期选择器的节点，只需显示它即可
//在我们正在更新的日期字段下面
如果（！displayBelowThisObject）
displayBelowThisObject=targetDateField；
//如果给定了日期分隔符，请更新dateSeparator变量
如果（dtSep）
dateSeparator=dtSep；
其他的
dateSeparator=defaultDateSeparator；
//如果给定了日期格式，请更新dateFormat变量
如果（DTF格式）
dateFormat=dtFormat；
其他的
dateFormat=defaultDateFormat；
var x=displayBelowThisObject.offsetLeft；
变量y=displayBelowThisObject.offsetTop+displayBelowThisObject.OffsetLight；
//处理表中的元素等
var parent=displaybelowthis对象；
while（parent.offsetParent）{
parent=parent.offsetParent；
x+=父级偏移量left；
y+=父项偏移量；
}
drawDatePicker（targetDateField，x，y）；
}
/**
在下面的位置绘制datepicker对象（它只是一个包含日历元素的表）
使用targetDateField对象作为输入标记，指定x和y坐标
最终将填充一个日期。
此函数通常由displayDatePicker函数调用。
*/
函数drawDatePicker（targetDateField，x，y）
{
var dt=getFieldDate（targetDateField.value）；
//datepicker表将在的内部绘制，其ID由
//全局datePickerDivID变量。如果HTML上还不存在这样的div
//我们正在处理的文档，添加一个。
如果（！document.getElementById（datePickerDivID））{
//不要使用innerHTML来更新主体，因为它会导致全局变量
//当前指向页面上具有错误引用的对象
//document.body.innerHTML+=“”；
var newNode=document.createElement（“div”）；
setAttribute（“id”，datePickerDivID）；
setAttribute（“类”、“dpDiv”）；
setAttribute（“样式”，“可见性：隐藏；”）；
document.body.appendChild（newNode）；
}
//将日期选择器div移动到适当的x、y坐标并切换可见性
var pickerDiv=document.getElementById（datePickerDivID）；
pickerDiv.style.position=“绝对”；
pickerDiv.style.left=x+“px”；
pickerDiv.style.top=y+“px”；
pickerDiv.style.visibility=（pickerDiv.style.visibility=“可见”？“隐藏”：“可见”）；
pickerDiv.style.display=（pickerDiv.style.display==“块”？“无”：“块”）；
pickerDiv.style.zIndex=1
$("input:text[name=to[0]]").blur( function() {
var b1 = $(this).val();
alert(b1);
});
if (dateString)
targetDateField.value = dateString;