Can OnClick call multiple functions?

[LacrosseB0ss]

I was wondering, can an OnClick event of a button call multiple functions?

The reason for this is I have a page that when "ok" is clicked, goes to a preview page before submitting data to the database. If "Modify" is clicked, I want to change session variables (using VB) and then go to the previous page (the easiest way I know how to do this is history.go(-1) in js).

Can OnClick call both functions? Or is there a way to do this in only VB or JS?

TIA
- LB

[AricC]

I think the easiest way would be make 2 functions then a 3 that will decide which of the 2 it wants to call.

[LacrosseB0ss]

The reason I wanted to do it this way was because I want to use Javascript code as well as VB code. The VB will change session variables and the JS will change the page.

I have since tried using VB and in the Page_Load method saying

Dim prevPageURL As String = Page.PreviousPage.ToString
cmdModifyForm.Attributes.Add("PostBackUrl", prevPageURL)
 

and then doing the session variables in cmdModifyForm_C lick. We'll see how that goes.

Thanks again
- LB

[steven]

You can just call a single function with the onclick, then this will call 2 other function.

<button onclick="javascript: funcCaller();" value="press me" />
 
<script type="text/javascript">
 
function funcCaller() {
  funcOne();
  funcTwo();
}
 
...
 
</script>

[Joe Lay]

Above code simply call 2 functions at the same time. I just want to know how to call functions like ELSE IF . if 1 function check finished , another to call


regards

[iam_clint]

<input type="button" onclick="functi on1(); function2(); function3(); function4(); function5();">

[Joe Lay]

i mean it's run all functions at the same time. i just want to run 1st function first. if the 1st function is OK, the second function to work.

Example is that ----
_______________ _______________ _______________ _______________ _____
function formcheck(){
if (usr==""){
alert ("Please provide User Name");
frm.usrid.focus ();
}
}

function numcheck(){

var NumExpression=/^[0-9]+$/;
if (!document.frm. scode.value.mat ch(NumExpressio n)){
alert("Invalid, Number Only");
frm.scode.selec t();
return false;
}

}

<input type="button" value="submit" onclick ="formcheck( ); numcheck();">
_______________ _______________ _______________ _______________ ____

so if i write like above state, it run all the alert messages. i just want to run formcheck() function first. if it is OK and no more blank " " in Text box , User will click Submit button, then the second numcheck() function will work.
I don't want to put 2 Submit button. That's the problem.
so~~~

How can i call function correctly ? Any1 please

[AricC]

i mean it's run all functions at the same time. i just want to run 1st function first. if the 1st function is OK, the second function to work.

Example is that ----
_______________ _______________ _______________ _______________ _____
function formcheck(){
if (usr==""){
alert ("Please provide User Name");
frm.usrid.focus ();
}
}

function numcheck(){

var NumExpression=/^[0-9]+$/;
if (!document.frm. scode.value.mat ch(NumExpressio n)){
alert("Invalid, Number Only");
frm.scode.selec t();
return false;
}

}

<input type="button" value="submit" onclick ="formcheck( ); numcheck();">
_______________ _______________ _______________ _______________ ____

so if i write like above state, it run all the alert messages. i just want to run formcheck() function first. if it is OK and no more blank " " in Text box , User will click Submit button, then the second numcheck() function will work.
I don't want to put 2 Submit button. That's the problem.
so~~~

How can i call function correctly ? Any1 please

Add a boolean var blnIsValid = true then set it to false anytime something doesn't go right at the end check that the variable is true if so go to function 2 if not go back to function 1.

[Joe Lay]

Add a boolean var blnIsValid = true then set it to false anytime something doesn't go right at the end check that the variable is true if so go to function 2 if not go back to function 1.

Please show me example codes or program...

[acoder]

Please show me example codes or program...

I assume you want something that shows an alert if there is a problem by going through the functions. You don't need the user to press the submit button again if the first validation passed.

Just include all your functions in one formCheck function. Then this function can call all the functions one by one. Whenever a function 'fails' (meaning there is an error), just return false, otherwise it continues on till the end:

function formCheck {
if (!numCheck()) return false;
if (!emailCheck()) return false;
...
}

is one way. There are other ways. For an example, see this. For a different style of form validation, see this link.