Using javascript to clip

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June 19th, 2009, 10:26 AM

viplort

Contributing User

Join Date: Jan 2007

Posts: 294

Time spent in forums: 1 Week 1 Day 7 h 27 m 29 sec
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JavaScript - Using javascript to clip

I'm trying to get this clipping thing to work and have so far been unsuccessful through javascript. It throws an error at the highlighted red saying "style is null or not an object". Any ideas on what I'm doing wrong here?

Code:

var topVal=40; 
var rightVal=105;
var bottomVal=40;
var leftVal=105;
var endInt2 = null;

function closeIt(id) {
var width= 210;
var height= 80;
var layered = document.getElementById(id).style;  

    if(leftVal > 0){ 
        topVal+=0;
        rightVal+=0;
        bottomVal+=0;
        leftVal-=20;
        layered.style.clip="rect("+topVal+"px "+rightVal+"px "+bottomVal+"px "+leftVal+"px)";
        endInt2 = setTimeout("closeIt('ctl00_ContentPlaceHolder3_Image1')",80)
    }else{
    alert(topVal+" "+rightVal+" "+bottomVal+" "+leftVal);
       endTimer2();
       }
} 


function endTimer2(){
    clearTimeout(endInt2);

}

June 19th, 2009, 10:30 AM

sync_or_swim

Moderator

Join Date: Mar 2006

Location: South Wales

Posts: 3,416

Time spent in forums: 2 Months 23 h 57 m 27 sec
Reputation Power: 1800

I'm not sure if this is the cause but you are setting the variable layered = document.getElementById(id).style:

Code:

var layered = document.getElementById(id).style;

You are then trying to reference the style attribute of the layered variable:

Code:

layered.style.clip="rect("+topVal+"px "+rightVal+"px "+bottomVal+"px "+leftVal+"px)";

Which in essence is saying:

Code:

document.getElementById(id).style.style.clip="rect("+topVal+"px "+rightVal+"px "+bottomVal+"px "+leftVal+"px)";

Comments on this post

viplort agrees: agree

June 19th, 2009, 11:52 AM

viplort

Contributing User

Join Date: Jan 2007

Posts: 294

Time spent in forums: 1 Week 1 Day 7 h 27 m 29 sec
Reputation Power: 46

Quote:

Originally Posted by sync_or_swim

I'm not sure if this is the cause but you are setting the variable layered = document.getElementById(id).style:

Code:

var layered = document.getElementById(id).style;

You are then trying to reference the style attribute of the layered variable:

Code:

layered.style.clip="rect("+topVal+"px "+rightVal+"px "+bottomVal+"px "+leftVal+"px)";

Which in essence is saying:

Code:

document.getElementById(id).style.style.clip="rect("+topVal+"px "+rightVal+"px "+bottomVal+"px "+leftVal+"px)";

Bingo!! Thanks S_O_S......

June 22nd, 2009, 06:02 AM

sync_or_swim

Moderator

Join Date: Mar 2006

Location: South Wales

Posts: 3,416

Time spent in forums: 2 Months 23 h 57 m 27 sec
Reputation Power: 1800

Quote:

Originally Posted by viplort

Bingo!! Thanks S_O_S......

You're welcome, glad it helped!!!

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