javascript - if statement with img.src -

the problem: whenever, if have single '=' variable show , fine.. ignores if statement. if double '=='.. variable doesnt show up, , goes else state. lemme know if u see wrong.

var pic1 = document.getelementbyid('team1pic').src; var win1 = document.getelementbyid('wins').innerhtml; if (pic1 == 'pens.jpg') {     document.getelementbyid('wins').innerhtml = pittwins; } else {     document.getelementbyid('wins').innerhtml = 'no'; } 

here html go along have

<a class="dock-item" id="pens" href="#" onclick="document.getelementbyid('team1pic').src='pens.jpg'"><span>pittsburgh penguins</span><img src="pens.jpg" alt="pittsburgh penguins" /></a>`  

and

<th width="35%" ><img src="" / id='team1pic'></th> 

i nice see html attached to.

the reason single = works == doesn't points conclusion not equal. reason shows = because assignment evaluates true. case assign variable "truthy", meaning value evaluate true in js. in javascript 0, false, null & undefined evaluate true.

you might want alert(pic1) see in there, or if using firefox or chrome can use javascript debugger tools.