需要JavaScript函数才能在textarea更改上运行
我有一个需要JavaScript函数才能在textarea更改上运行,javascript,textarea,Javascript,Textarea,我有一个,一旦我点击一个按钮,它就会变成一个文本区。这个很好用。我还有一个characterCounterEdit功能,它也可以工作。唯一的问题是,字符计数器只有在我单击文本区域中的光标时才起作用。我想在跳入editCommentToggle()后立即触发字符计数器函数 JavaScript: function editCommentToggle( id ) { theRow = document.getElementById("id"+id); //user = theRow.
,一旦我点击一个按钮,它就会变成一个文本区。这个很好用。我还有一个characterCounterEdit功能,它也可以工作。唯一的问题是,字符计数器只有在我单击文本区域中的光标时才起作用。我想在跳入editCommentToggle()后立即触发字符计数器函数
JavaScript:
function editCommentToggle( id )
{
theRow = document.getElementById("id"+id);
//user = theRow.cells[0].innerHTML;
//date = theRow.cells[1].innerHTML;
com = theRow.cells[2].innerText ;
idx = 2;
maxlength = 250;
// Comment field
cell = theRow.cells[idx];
while( cell.childNodes.length > 0 ) cell.removeChild(cell.childNodes[0]);
spanTag = document.createElement("span");
spanTag.innerHTML = "You have <strong><span id='commentsCounter'>"+maxlength+"</span></strong> characters left.<br/>";
cell.appendChild(spanTag);
element = document.createElement("textarea");
element.id="commentsTextArea-"+id;
element.rows="3";
element.value = com;
element.style.width = "400px";
element.maxLength = "250";
element.onfocus = element.onkeydown = element.onkeyup = function(){return characterCounterEdit('commentsCounter', maxlength, this);};
cell.appendChild(element);
$(function()
{
setTimeout("syncCommentTableSizes()",0); <%-- Run after HTC code --%>
});
// Actions field
cell = theRow.cells[++idx];
while( cell.childNodes.length > 0 ) cell.removeChild(cell.childNodes[0]);
link = document.createElement("a");
link.href = 'javascript:saveComment('+id+')';
element = document.createElement( "img" );
element.className = "smallicon edit"; // check if we need this changed
element.src="../images/icon_save.gif";
element.border="0";
element.alt = "Save";
link.appendChild( element );
cell.appendChild(link);
cell.appendChild( document.createTextNode(" ") );
link = document.createElement("a");
link.href = 'javascript:cancelCommentEdit('+id+')';
element = document.createElement( "img" );
element.className = "smallicon delete"; // check if we need this changed
element.src="../images/icon_cancel.gif";
element.border="0";
element.alt = "Cancel";
link.appendChild(element);
cell.appendChild(link);
}
function characterCounterEdit(id, maxLen, inputElement)
{
spanId = document.getElementById(id);
if (spanId)
{
// Update the counter the user sees.
var whatIsLeft = maxLen - inputElement.value.length;
if ( whatIsLeft < 0 ) whatIsLeft = 0;
spanId.innerText = whatIsLeft;
}
// Restrict user from entering more than the maxlen.
if ( inputElement.value.length > maxLen )
{
inputElement.value = inputElement.value.substring( 0, maxLen );
}
}
函数editCommentToggle(id)
{
theRow=document.getElementById(“id”+id);
//user=theRow.cells[0].innerHTML;
//date=theRow.cells[1].innerHTML;
com=theRow.cells[2].innerText;
idx=2;
最大长度=250;
//注释字段
cell=row.cells[idx];
而(cell.childNodes.length>0)cell.removeChild(cell.childNodes[0]);
span标签=document.createElement(“span”);
spanTag.innerHTML=“您还有“+maxlength+”个字符。
”;
cell.appendChild(spanTag);
元素=document.createElement(“textarea”);
element.id=“commentsTextArea-”+id;
element.rows=“3”;
element.value=com;
element.style.width=“400px”;
element.maxLength=“250”;
element.onfocus=element.onkeydown=element.onkeyup=function(){return characterCounterEdit('commentsCenter',maxlength,this);};
子单元(元素);
$(函数()
{
setTimeout(“syncCommentTableSizes()”,0);
});
//动作场
单元格=当前单元格[++idx];
而(cell.childNodes.length>0)cell.removeChild(cell.childNodes[0]);
link=document.createElement(“a”);
link.href='javascript:saveComment('+id+');
元素=document.createElement(“img”);
element.className=“smallicon edit”;//检查是否需要更改此项
element.src=“../images/icon_save.gif”;
element.border=“0”;
element.alt=“保存”;
link.appendChild(元素);
附加子单元(链接);
cell.appendChild(document.createTextNode(“”);
link=document.createElement(“a”);
link.href='javascript:cancelCommentEdit('+id+');
元素=document.createElement(“img”);
element.className=“smallicon delete”;//检查是否需要更改此项
element.src=“../images/icon\u cancel.gif”;
element.border=“0”;
element.alt=“取消”;
link.appendChild(元素);
附加子单元(链接);
}
函数字符计数器编辑(id、maxLen、inputElement)
{
spanId=document.getElementById(id);
如果(spanId)
{
//更新用户看到的计数器。
var whatisleet=maxLen-inputElement.value.length;
如果(whatisleet<0)whatisleet=0;
spanId.innerText=whatisleet;
}
//限制用户输入超过最大值的内容。
if(inputElement.value.length>maxLen)
{
inputElement.value=inputElement.value.substring(0,maxLen);
}
}
为什么不在editCommentToggle()中调用所需的方法呢。你似乎暗示这是你想做的,但我不确定你为什么没有做
function editCommentToggle( id )
{
//code to get the element here first as pointed out by a comment below.
characterCounterEdit('commentsCounter', maxlength, element);
.... rest of the function
}
好啊那就这么做吧。。。。你已经知道你想做什么了。。。为什么要问这里?@diEcho说真的???@Neal你比我更有知识。:)@那么,diEcho回答jQuery问题,不提“javascript”问题怎么样?>@diEcho-因为为简单的东西加载一个巨大的库通常是过分的。我正在这样做….element.onfocus=element.onkeydown=element.onkeyup=function(){return characterCounterEdit('commentsCenter',maxlength,this);};子单元(元素)
那么你的意思是这个函数只激发onfocus而不是onkeydown或onkeyup?它只在我点击文本区域时激发…不是在我点击调用editCommentToggle的按钮时激发..它怎么能在调用editCommentToggle后立即激发?然后,与其把它放在onclick监听器上,不如把方法调用放在editCommentToggle内方法。我将编辑我的答案。您需要在创建元素后传入它,而不是此