html - javascript function onclick must click twice -_- why so? -

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i have page(it faq page web site) such when user click on div (e.g. #question01) there's new div appears below it. easy thing function, when click first time, nothing appears, click , there go. #faqanswer01 has "unhide" class set display:block; (.hide = display:none;)

so here 2 question :

1- why have click twice function executed?

2- how can fix code works after 1 click?

html code

<div id="faqcontainer">     <div id="question01" onclick="showanswer('faqanswer01','imgarrow01');">here's question?<img src="public/images/gt.png" class="imgarrow" id="imgarrow01"></div>         <div id="faqanswer01" class="faqanswerdiv hide">bla bla bla</div>     <div id="question02" onclick="showanswer('faqanswer02','imgarrow02');">another question here? <img src="public/images/gt.png" class="imgarrow" id="imgarrow02"></div>     <div id="faqanswer02" class="faqanswerdiv hide">answer here.</div>  </div>

my function: 

function showanswer(idanswer , idimg) {     if (document.getelementbyid(idimg).src == "http://www.cbifinance.org/public/images/gt.png") {         document.getelementbyid(idimg).src = "http://www.cbifinance.org/public/images/gt90.png";         document.getelementbyid(idanswer).classname = 'faqanswerdiv unhide';     } else {         document.getelementbyid(idimg).src = "http://www.cbifinance.org/public/images/gt.png";         document.getelementbyid(idanswer).classname = 'faqanswerdiv hide';     } }

try changing image.src full url , should work.

the reason work src public/images/gt.png though when loads image finds correctly, src still public/images/gt.png.

so first time click, runs else statement, , sets src full absolute url. click again , changed src expected first time. same goes class, adding hide class image, has second time adds show. code functioning correctly, if statement wrong.


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