在动态创建一些 iframe、设置 src 和 onload 之后,我希望内容可用于将其放入数组并对数组进行排序。接下来将删除 iframe(有趣的内容已经放入数组中)并在我的 HTML 页面上创建一个表格。如果在排序之前未设置警报,则数组为空,因为 onload 在完成脚本之前触发。当在排序之前发出警报时,我发现 onload-procedure 已触发,数组已填充并且一切正常?!但我不想发出警报,谁能解释我做错了什么?这是我的第一个脚本,所以请帮助我理解。
function LoadFile( ) {
var FName, PName, myID, myFrame;
var myBody = document.getElementById("StartList");
for ( var i = 0; i < FileList.length; i++ ) {
// Read input file into frame
FName = FileList[i].FName;
PName = FName + ".html";
myID = "iframe" + i;
// Create frame.
myFrame = document.createElement("iframe");
myFrame.setAttribute("id", myID);
myFrame.setAttribute("width","0");
myFrame.setAttribute("height","0");
myFrame.setAttribute('src', PName);
//Attach onload-event to frame, triggering ReadTableInfo.
if (myFrame.attachEvent){
myFrame.attachEvent("onload", function(){
ReadTableInfo();
});
} else {
myFrame.onload = function(){
ReadTableInfo();
};
}
myBody.appendChild(myFrame);
}
}
function ReadTableInfo() {
var a = document.getElementsByTagName("iframe")[idx];
var p = FileList[idx].FName;
var b = (a.contentWindow || a.contentDocument);
var td;
if ( b.document) {
b = b.document;
// Get and process table with functions and procedures.
var myTable = b.getElementsByTagName("Table")[5];
var myList = myTable.getElementsByTagName("TR");
var Name = "";
var Desc = "";
for ( var j = 0; j < myList.length; j++) {
Name = myTable.getElementsByTagName("TR") [j].getElementsByTagName("A")[0].innerHTML;
if ( myTable.getElementsByTagName("TR")[j].getElementsByTagName("TD")[1] != null) {
td = myTable.getElementsByTagName("TR")[j].getElementsByTagName("TD")[1];
Desc = td.textContent || td.innerText || "";
}
if ( searchval == "" || ( TestVal.test(Name) && searchkey == 1 ) || ( TestVal.test(Desc) && searchkey == 2 ) ) {
ProcList[ProcList.length++] = new AddProcList(Name.toLowerCase(), p.toLowerCase(), Desc);
}
Name = "";
Desc = "";
}
idx++;
}
}
function UpdateList( opt ) {
searchval = document.getElementById("edtSearchVal").value;
TestVal = new RegExp(".", "i");
if ( searchval !== "" ) {
if ( opt == 2 ) {
TestVal = new RegExp(searchval, "i"); // searchpattern for RegExp descriptions
} else {
TestVal = new RegExp(searchval.replace(" ","_"), "i"); // searchpattern for RegExp.
}
}
switch ( opt ) {
case 1: searchkey = 1;
break;
case 2: searchkey = 2;
break;
default:
searchkey = 3;
}
Init();
// Get package names from index.
SetFileList(); // Determines which external files to examine.
LoadFile(); // Loads the external files into iframes to be used later.
alert("Start generating list, this may take a while."); // Necessary to read frames! Don't know why???
var sortkeys = {FName:"a",PName:"a"}; // Sorting order of ProcList, which will be the listorder.
ProcList.keySort(sortkeys); // Sort ProcList.
TableCreate(); // Make new table with all entries in ProcList
}
感谢您的任何评论,只是在这里向他人学习:))