Web Development

17-Sep-05 3:02

hello everyone.
if i have a html form in the current page and i type in IE's address box

javascript:document.forms[0].action="index2.asp"; then instead of setting the form to post the data to index2.asp it just generates another page just containing "index2.asp" text.

also, if i type javascript:document.forms[0].onsubmit=alert(); it immediately executes alert() showing a messagebox, instead of showing it when i click the submit button.

this has to be done in IE's bar, not in the html page itself.
what am i doing wrong?

Guffa17-Sep-05 3:26

17-Sep-05 3:26

The second one is easy. You set onsubmit to be the return value of the call to alert(), of course it will execute alert() immediately to get the return value to put into onsubmit. If you want onsubmit to contain the code that calls alert, you have to enclose it in quotes.

The first one I haven't figured out yet...

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namespaceuser17-Sep-05 3:47

17-Sep-05 3:47

to enclose what in quotes?
please post the full line, so that when i submit the form(not when i press enter, after typing code into the address bar) an empty message box appears.

Guffa17-Sep-05 4:00

17-Sep-05 4:00

Enclose the code in quotes.

document.forms[0].onsubmit="alert();";

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namespaceuser17-Sep-05 7:27

17-Sep-05 7:27

that's what i'm trying to tell you. i doesn't work. as soon as i type(or paste) the code in the address bar and hit enter the page changes to a blank page containing only "alert();" without the quotes. right-click -> view source on the page opens notepad containing only "alert();"(without the quotes). have you tried this yourself and it works?

Guffa17-Sep-05 7:47

17-Sep-05 7:47

Oh, now I see.

That is because the code returns a value, that value is used to create a new page. Put void(0); at the end of the code, and it will not create a new page.

The same happens if you have javascript in the href property of a link.

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namespaceuser17-Sep-05 11:39

17-Sep-05 11:39

1. setting a string works :
javascript:document.forms[0].action="index2.asp";void(0);

2. setting a function does not work :
javascript:document.forms[0].onsubmit="alert();";void(0);
i've also tried this on a submit button with no luck :
javascript:document.forms[0].elements[5].onclick="alert();";void(0);
in both cases the form submits but no empty alert box is displayed(i've also tried with window.open() instead of alert()).

3. what function should i use while a page is loading so that after the page completely loads, an empty message box would be diplayed. for example:

javascript:document.onPageComplete="alert('Page Loaded');";void(0); //would wait for the page to load and display Page Loaded.

4. what should i use instead of quotes if i try to run a more complex script?
for example:
javascript:document.forms[0].elements[5].onclick="document.forms[0].onsubmit="alert('ok');";void(0);";
i can't use single quotes because these already mark a string. Should I use \' or \" ?

-- modified at 17:46 Saturday 17th September, 2005

Guffa17-Sep-05 12:44

17-Sep-05 12:44

2. You have to assign a function to the event:

.onsubmit = Function("alert();");

3. onload

4. Inside a string surrounded by qoutes, you use \" for a quoute. Inside a string surrounded by apostrophes, you use \' for an apostrophe. Use \\ for \.

Example:

document.forms[0].elements[5].onclick='document.forms[0].onsubmit=\'alert(\\\'ok\\\');\';void(0);';

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namespaceuser17-Sep-05 13:38

17-Sep-05 13:38

Guffa wrote:
2. You have to assign a function to the event:

.onsubmit = Function("alert();");

3. onload
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2. still nothing. after this:
javascript:document.forms[0].onsubmit=Function("alert();");
i typed this :
javascript:alert(document.forms[0].onsubmit);
i got this:
function anonymous {
alert();
}
i clicked the submit button and still the same. submits, but no alert box.

3. i used document.body.onunload to make it easier to display after clicking a link. same as above. nothing.

do these work for you? Frown | :(

-- modified at 19:40 Saturday 17th September, 2005

Guffa17-Sep-05 22:39

17-Sep-05 22:39

You can't call alert without a parameter.

alert(1);

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namespaceuser19-Sep-05 13:51