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JavaScript - Can Anyone Explain Whats Going On In This Program Please? Weird Variable Names
Find it really hard to understand these random variable names and what they are doing, can anyone explain what is going on exactly in the bolded parts. I have a rough idea but the 3 arrays confuse me somewhat
im sure the random variable names are pointers and counts but id love to hear an expert explain them for sure thanks if you can help or are willing to take the time Similar Tutorials<script type="text/javascript"> var myString = "zero one two three four"; var mySplitResult = myString.split(" "); for(i = 0; i < mySplitResult.length; i++){ document.write("<br /> Element " + i + " = " + mySplitResult[i]); } </script> "split" function splits the string whenever it encounters "space". But please explain me how the strings are stored in "mySplitResult". And can we use Arrays for this program? If so, can you code it. Thanks in advance! overImg=[];outImg=[]; outImg[0]=new Image();outImg[0].src="images/enter1.gif"; overImg[0]=new Image();overImg[0].src="images/enter2.gif"; outImg[1]=new Image();outImg[1].src="images/keio.gif"; overImg[1]=new Image();overImg[1].src="images/inria.gif"; function chgImg(img,type){ switch(type){ case "over":document.images[img].src=overImg[img].src;break; case "out":document.images[img].src=outImg[img].src;break; }} why are arrays used here ? Hi I've got about 40 check-boxes on my 1 form. These check-boxes all have names (obviously) but they are NOT all unique names. The number of UNIQUE names on my form is probably around 8 or 9 (the actual number is NOT important). Because some check-boxes use the same names as other. It's set up this way, please don't ask me to change it, I can't change it. What's the syntax/method for looping through all the names? I was thinking I should do maybe a "for" loop; Code: for (var i = 0; i < fieldName.length; i++) But I don't know how to hold a variable of the unique names to start with. Can someone help please? Ok, below is an example of what I am trying to do (it's easier to show than try to explain). Code: var abc1 = "this text ";
var abc2 = "that text ";
var abc3 = 483967;
var xNum = 2;
var myNum = "abc"+xNum;
alert (myNum); // this gives the expected "abc2"
concatCall();
function concatCall() {
var newOne = myNum + abc3; //the output I want is "that text 483967" instead of "abc2483967"
alert (newOne);
}
Now in the function, the variable is behaving as it should and I expected that, what I want though is what is commented. Any ideas on how that can be done? I know it has to do with the fact that once the var and string are concatenated, they become a string. What I want to know is the way to convert the string into a variable name that will produce the variable's data instead of the variable name. (for the curious, I have a <ul> that is passing the xNum var to my JS and currently have an else if statement to output the correct data - i'm looking for a way to shorten this code) I have a form with several types of checkboxes, and I'm trying to check all but one of them to determine if any of those have been checked. I do not want to check 'all', but I want to see if any of the 'check_' or 'check2_' checkboxes have been checked. There are a variable number of checkboxes, so this is just an example with two of each. Set 1 and Set 2 will always have the same number of checkboxes as each other, though. I'm having trouble getting the function to do this - so any guidance would be appreciated. Code: <script language="JavaScript">
function checkForNone() {
checked=false;
for (i=0,n=selectForm2.elements.length;i<n;i++) {
if (document.selectForm2.getElementById("check_"+String(i)).checked || document.selectForm2.getElementById("check2_"+String(i)).checked ) {
checked=true;
}
}
if (checked==true) {
alert("OK!");
return true;
}
else {
alert("Please select at least one checkbox.");
return false;
}
}
</script>
PHP Code: echo " <form name='selectForm2' id='selectForm2'> Overall: <br> <input type='checkbox' name='all' value='' class='resultsAll' id='all'> Set 1: <br> <input type='checkbox' name='check_1' value='01' class='results1' id='check_1'><br> <input type='checkbox' name='check_2' value='02' class='results1' id='check_2'><br> <br> Set 2: <br> <input type='checkbox' name='check2_1' value='01' class='results2' id='check2_1' disabled='true'><br> <input type='checkbox' name='check2_2' value='02' class='results2' id='check2_2'> <br><br> Check for none selected <input type='button' onclick=\"checkForNone();\" /> </form> "; <script type="text/javascript"> function display(action, id) { if (action == 'show') { document.getElementById("explanation"+id).style.display = "block"; document.getElementById("link"+id) = "javascript:display('hide', "+id+")"; } if (action == 'hide') { document.getElementById("explanation"+id).style.display = "none"; document.getElementById("link"+id) = "javascript:display('show', "+id+")"; } } </script> umm Hi i wrote a script with little help from internet but i dont truly understand it, can anyone please explain to me what every line in this script is doing ? im asking polite. var przed="zostalo do urodzin" var obecnie="dzisiaj urodziny" var Tablica=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec") function odliczanie(r,m,d){ theyear=r;themonth=m;theday=d var dzisiaj=new Date() var rok=dzisiaj.getYear() if (rok < 1000) rok+=1900 var miesiac=dzisiaj.getMonth() var dzien=dzisiaj.getDate() var godzina=dzisiaj.getHours() var minuta=dzisiaj.getMinutes() var sekunda=dzisiaj.getSeconds() var dzisiajstring=Tablica[miesiac]+" "+dzien+", "+rok+" "+godzina+":"+minuta+":"+sekunda dataa=Tablica[m-1]+" "+d+", "+r dd=Date.parse(dataa)-Date.parse(dzisiajstring) dday=Math.floor(dd/(60*60*1000*24)*1) dgodz=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1) dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1) dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1) if(dday==0&&dgodz==0&&dmin==0&&dsec==1){ document.forms.count.count2.value=obecnie return } else document.forms.count.count2.value=dday+ " dni, "+dgodz+" godzin, "+dmin+" minut, i "+dsec+" sekund "+przed setTimeout("odliczanie(theyear,themonth,theday)",1000) } odliczanie(2015,1,20) I tried a a few tutorials but still can't get it, can any simply closures please?
So today I learned about the ()'s for functions so I was like always studying and I cannot understand how this snippit works, here it is. Quote: var say = function(what) { what('say function'); } var hello = function (who) { alert('Hello '+who); // outputs "Hello say function" } say(hello); So the say(hello); is activating the function. The (hello) should be passed for (what) so the function(who) is now inside the other or something? Can someone please list steps like 1-10 of how this code ends up saying "Hello say function" at the end? thank you so much i got this code from this thread http://www.codingforums.com/showthread.php?t=241809(THanks to jmrker) and i was wondering if you could explain how it works(The creating textboxes and the randomization). Edit: SOrry i forgot to include the code Code: <!DOC HTML>
<html>
<head>
<title> Untitled </title>
<script type="text/javascript">
// From: http://www.codingforums.com/showthread.php?t=241809
var maxSeats = 341;
var rndSeats = 10;
function randOrd() { return (Math.round(Math.random())-0.5); }
function createDisplay() {
var seating = [];;
var str = '';
for (var i=0; i<maxSeats; ++i) { seating.push(0); }
for (var i=0; i<maxSeats; i++) {
str += '<input type="text" size="1" id="s'+i+'" value="'+seating[i]+'">';
if ((i % 33) == 32) { str += '<br>'; }
}
document.getElementById('auditorium').innerHTML = str;
}
var sarr = [];
function randomize() {
for (var i=0; i<maxSeats; i++) { sarr[i] = i; }
sarr.sort(randOrd);
}
var tptr;
var ptr = 0;
function pauseDisplay() {
document.getElementById('s'+sarr[ptr]).value = 'x';
document.getElementById('s'+sarr[ptr]).style.backgroundColor = 'red';
if (ptr < (maxSeats-rndSeats)) { ptr++; tptr = setTimeout("pauseDisplay()",250); }
}
window.onload = function() {
createDisplay();
randomize();
tptr = setTimeout("pauseDisplay()",250);
}
</script>
</head>
<body>
<div id="auditorium"></div>
</body>
</html>
Hi all, First of all, I am not a student and this is not homework. Secondly, I've been programming in C, Motorola assembler, Intel assembler and even GWBasic for years. I recently (this year) got into Web / Javascript / PHP / HTML programming and I'm clawing up the learning curve. I know a fair amount, but have a long way to go. OK here's my problem: I've been trying to integrate a WYSIWYG editor (TinyMCE) into a bulletin board software package (PHPBB3). All is working well except for one big stumbling block that I've been battling for the past MONTH!...: I want to support the original BBCode system of PHPBB3 (mostly because of the ability for the admin to add custom BBCodes). So, what I need to do is this: (1) Select a range of text. (2) Either REPLACE it with "[tag]selection[/tag]" or else INSERT "[tag]" before and "[/tag]" after. (3) Lastly, the original selection must remain selected so that additional BBCodes can be wrapped without the need to re-select. The purpose of (3) is, say, the user clicks "bold" and "italic" and "underline".... all they should have to do is click those 3, not re-select each time. I've tried doing this: (1) get the selection range (2) get the selection text (3) delete the range contents (4) create two "contextual fragments" (one for the opening tag, the other for the closing tag). (5) create a <span> element containing the selection text (6) Insert it all into the range with range.insertNode() (7) finally select the new span element This seems to work fine, but Internet Explorer fails (it complains when I try to get the selection range). I just don't know what I'm doing wrong... and worse I'm not even sure if I'm attacking the problem the proper way. Any ideas would be greatly appreciated! Thanks! -- Roger hi, i would like to know what kind of mechanism does the bolded part trigger Code: G = function(a) {
if (i !== a) {
var b = i;
i = a;
for (a = 0; a < A.length; ++a)
A[a](b)
}
}
i dont want to know what the function does, just a wild guess, would it be the A array is replaced with functions names? R. I've been playing with this workarouns for literally years, but I'm getting fed up with it. Can anyone here suggest a better way of dealing with the following conundrum - or at least clarify why it occurs? When I have an external stylesheet I can't access the properties assigned therein. I'll give an example - HTML/CSS/JS are all inseperate files - but everything is called into the HTML as you can see. HTML: Code: <head> <script type="text/javascript" src="js.js"></script> <link href="style.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="box" onclick="showWidth()"></div> <body> CSS (style.css) Code: #box {
width: 200px;
}
Javascript (js.js) Code: function showWidth(){
var box = document.getElementById('box');
alert(box.style.width);
}
Now the alert fired by showWidth() is empty - meaning that javascript can't see the width of the div element 'box' Now, if I assign width as part of the style attribute of the div javascript thus: HTML: Code: <head> <script type="text/javascript" src="js.js"></script> <link href="style.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="box" onclick="showWidth()" style="width: 200px;"></div> <body> javascript can see this and the alert fired by showWidth() shows '200px'. So, I have two questions: 1. Why? 2. Is there a way of accessing these external style elements without having to define styles inline all the time? Cheers! Mike Hi, I am hoping a JS expert might be able to explain this function. It is part of a larger programme. The program basically checks which profile the user selects and sets the html to display in certain colours. I am still trying to understand programming. The part I don't understand is the SetCookie("profile", i); What is this function telling the SetCookie function to do? Why does this work? Really grateful for any info.Thanks in advance. ************************************************* function updateProfile() { for (var i=0;i<document.form1.profile.length;i++) { if (document.form1.profile[i].checked) { SetCookie("profile", i); } } document.location="cookie3.html"; } OK, I work for a company that accepts donations. Currently, the donation page looks nothing like the rest of the site. So I recreated the page to look like the rest of the site. But when I do so, Chrome shows it as a "security risk". Someone looked at it and told me that it's because the .js files aren't compressed and the browser considers this a security risk. So how do I compress the files? PHP Code: <script type="text/javascript"><!--//--><![CDATA[//><!-- sfHover = function() { var sfEls = document.getElementById("nav").getElementByClass("subMenuWrapper"); for (var i=0; i<sfEls.length; i++) { sfEls[i].onmouseover=function() { this.className+=" sfhover"; } sfEls[i].onmouseout=function() { this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); } } } if (window.attachEvent) window.attachEvent("onload", sfHover); //--><!]]></script> Im trying to get the sub navigation to work in ie 6 but can get it working.. can anybody tell me what the above funtion does and how i might be able to apply it to my code... the navigation i have so far is on http://www.corkdesigns.ie/ep3/testing.html Hope someone can help or is the a simple hack i can use for ie 6 for this navigation http://www.corkdesigns.ie/ep3/navigation1.html Thanks So I had the orginial code just switch images, I was under the impression I could use "var clientData" to make an array. However this is not working out the way I had hoped. Any help or explanation, greatly appreciated. It's very sloppy now! Don't judge. Here is my Javascript: Code: <script type="text/javascript">
var imgList = [
"../Assets/Images_Revised/40_kitchen.jpg",
"../Assets/Images_Revised/40_stair.jpg",
"../Assets/Images_Revised/C_front2.jpg",
"../Assets/Images_Revised/C_rear_side_combo.jpg",
"../Assets/Images_Revised/C_side.jpg",
"../Assets/Images_Revised/Y_combo.jpg",
"../Assets/Images_Revised/Y_window.jpg"
];
var clientData = [
"This is Data for Client 1";
"This is Data for Client 2";
"This is Data for Client 3";
"This is Data for Client 4";
"This is Data for Client 5";
"This is Data for Client 6";
"This is Data for Client 7"
];
var currentMain = 0;
var currentMainT = 0;
function Prev()
{
return ShowMain(currentMain-1);
return ShowMainT(currentMainT-1);
}
function Next()
{
return ShowMain(currentMain+1);
return ShowMainT(currentMainT+1);
}
function ShowMain(which)
{
currentMain = which;
currentMainT = which;
if ( currentMain < 0 ) currentMain = 0;
if ( currentMainT < 0 ) currentMainT = 0;
if ( currentMain > imgList.length-1) currentMain = imgList.length-1;
if ( currentMainT > clientData.length-1) currentMainT = clientData.length-1;
document.getElementById('mainImg').src = imgList[currentMain];
document.getElementById('mainText').src = clientData[currentMainT];
var PD = document.getElementById('Pg');
var PD2 = document.getElementById('Pg2');
if (PD != null ) PD.innerHTML = 'Image '+(currentMain+1)+' of '+imgList.length;
if (PD2 != null ) PD2.innerHTML = (currentMainT+1)+' of '+clientData.length;
return false;
}
onload = function() { ShowMain(0); }
onload = function() { ShowMainT(0); }
</script>
Here is my area I am showing it. Code: <a href="#" onclick="return ShowMain(0); return ShowMainT(0)">1</a ><a href="#" onclick="return ShowMain(1); return ShowMainT(1);">2</a ><a href="#" onclick="return ShowMain(2); return ShowMainT(2)">3</a ><a href="#" onclick="return ShowMain(3); return ShowMainT(3)">4</a ><a href="#" onclick="return ShowMain(4); return ShowMainT(4)">5</a ><a href="#" onclick="return ShowMain(5); return ShowMainT(5)">6</a ><a href="#" onclick="return ShowMain(6); return ShowMainT(6)">7</a ><a href="#" onclick="return Prev();" class="gallery"><</a ><a href="#" class="gallery" onclick="return Next();">></a> <span id="mainText">Click on a Client for Information.</span> Please, if you would explain this regex fragment [^>]* to me. Thank you for reading this post. (I know how to use the ThankYou button ) Hello I am new to javascript and have the following question: Is it normal that the Document.links property only counts links that are placed before the command? example: Code: <body> <script type="text/javascript"> document.write (document.links.length); </script> <p><a href="http://www.youtube.com/watch?v=gt9j80Jkc_A#">Youtube link</a></p> <script type="text/javascript"> document.write (document.links.length); </script> </body> The result is Quote: 0 Youtube link 1 How can I avoid this? Only by putting the code at the end of the document? And since i am asking? Is it possible to search a entire document for a string and replace that string with one command? (don't give me exact solution please just a hint what direction i should be searching in). Kind regards I am trying to understand what this javascript function is trying to accomplish. Can anyone breifly describe what the function is doing? If you can do a break down that would be great for me to understand this a bit better. I apreciate any assistance! Code: /* Engagement Score */
s.eVar5=s.engagementScore('event31','s.pageName|products|1>s.events|event6|1>s.eVar3|competitiveMatrix.pdf|1>s.pageName|webLeadsForm:complete|1>s.events|purchase|1>s.events|event4|1>s.events|scView|1');
/* Engagement Score Tracking */
s.engagementScore = new Function("e","l","c","");
var A,B,C,D,E,F,G,H,I,J;
I=J='';
A=s.split(l,'>');
B=A.length;
E=c?c:'s_ES';
//D=value of cookie with name 'E'
D=s.c_r(E);
if(!D){
for(C=0;C<B;C++){
D=D+'0,';
}
}
D=s.split(D,',');
for(C=0;C<B;C++){
F=s.split(A[C],'|');
G=eval(F[0]);
if(D[C]==1){
I=I+'1,';
} else if(G!=undefined){
if(G.indexOf(F[1])>-1&&D[C]!=1){
s.events=s.apl(s.events,e,',',2);
s.products=s.apl(s.products,';;;;'+e+'='+F[2],',',2);
I=I+'1,';
J='+'+F[2];
} else {
I=I+'0,';
}
} else{
I=I+'0,';
}
}
s.c_w(E,I,0);
return J;
s.split=new Function("l","d",""+"var i,x=0,a=new Array;while(l){i=l.indexOf(d);i=i>-1?i:l.length;a[x"+"++]=l.substring(0,i);l=l.substring(i+d.length);}return a");
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