Trouble passing variable on event to function

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May 4th, 2008, 12:10 AM

infamous_Q

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Trouble passing variable on event to function

Here's my problem. I'm creating a type of scrolling function for different html objects. Anyways, i want to make the javascript function usable on a bunch of different objects. The trouble i'm having is passing variables through all the quotes on an event. Here's the code:

Code:


<script type="text/javascript">

// How much to shift each time
var shDist = 1;

// Set interval in ms, and interval variables
var intv = 10;
var r;
var l;

function scRight(x)
{
	var scBod = document.getElementById(x);
	scBod.scrollLeft = scBod.scrollLeft + shDist;
}

function scLeft(x)
{
	var scBod = document.getElementById(x);
	scBod.scrollLeft = scBod.scrollLeft - shDist;
}
</script>
<html>
<body>

<button id="Larrow" onmouseover="l=setInterval('scLeft(main)',intv)" onmouseout="clearInterval(l)"><--</button>
<br />
<div id="main" style="overflow: hidden; border: 2px solid; width: 300px; height: 50px;">this is just garbage to make it scrollable arpjeiajrpeiajrpiejarpiejarpejaripjeapirjepairjepairjepajriepajrieojarpejaignhioejarijeaporjeaprijea  pojrepajrepajreiajriepajriearjeipajrepiajnnaoirjeioapjibjaioerjpaoejtijaibhgairejiepajgiaenrijeairpj  eiaopjnhaknbaegonapeoirjaewinhiantiea</div>
<br />
<button id="Rarrow" onmousedown="r=setInterval('scRight(main)',intv)" onmouseup="clearInterval(r)">--></button>

</body>
</html>

Any advice on what i should do to pass the "main" id to the scRight and scLeft functions?

May 4th, 2008, 02:45 AM

lnxgeek

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You're passing the return of the function call to setInterval (which in this case is non-existent); you need to pass an anonymous function wrapping your function call and arg(s), e.g.

Code:

setInterval( function() { yourFuncDef(arg) }, interval );

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May 4th, 2008, 11:27 AM

infamous_Q

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Quote:

Originally Posted by lnxgeek

You're passing the return of the function call to setInterval (which in this case is non-existent); you need to pass an anonymous function wrapping your function call and arg(s), e.g.

Code:

setInterval( function() { yourFuncDef(arg) }, interval );

wow wicked, thanks. changing the event to setInterval(function() {scRight('main')},intv) (or scLeft) worked perfectly

Comments on this post

lnxgeek agrees: Thanks for following up.

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