Javascript-форум - Выпадающий текст по нажатию на ссылку

Добрый день! Помогите пожалуйста. При имеющемся коде при нажатии на ссылку текст выпадает только после второго нажатия, а после первого ничего не происходит. Что надо исправить?

<script>
var show = document.getElementById(type);
function hidetxt(type){
 param=document.getElementById(type);
 if(param.style.display == "none") {
 if(show) show.style.display = "block";
 param.style.display = "block";
 show = param;
 }else param.style.display = "none"
}
</script>

<div class="questions-main">
			        
<div>
<a onclick="hidetxt('div1');" class="block-title" rel="nofollow" href="#"><span>Ссылка 1</span></a>
<div class="block-main" id="div1">Выпадающий текст 1</p>
</div>
</div>
<div>
<a onclick="hidetxt('div2'); return false;" class="block-title" rel="nofollow" href="#"><span>Ссылка 2</span></a>
<div class="block-main" id="div2">
<p>Выпадающий текст 2</p>
</div>
</div>
<div>
<a onclick="hidetxt('div3'); return false;" class="block-title" rel="nofollow" href="#"><span>Ссылка 3</span></a>
<div class="block-main" id="div3">
<p>Выпадающий текст 3</p>
</div>
</div>
</div>

.questions {padding: 85px 0 63px;}
.questions .title2 {margin-bottom: 43px;}
.block-main {display: none;}
.block-title {position: relative; color: #000; width: 775px; font-size: 19px; line-height: 23px; margin-bottom: 10px; display: inline-block; *display: inline; *zoom: 1; text-decoration: none; cursor: pointer;}
.block-title span {border-bottom: 1px dashed #b2b2b2; }
.block-title:hover span, .opened .block-title span {border: 0;}
.opened .block-title:before {content: ""; position: absolute; left: -23px; top: 10px; width: 0; border: 5px solid transparent; border-top: 4px solid #ff9898;}
.block-title:before {content: ""; position: absolute; left: -23px; top: 10px; width: 0; border: 5px solid transparent; border-left: 4px solid #ff9898; border-top: 4px solid transparent;}
.block-main {background: #fbf8ed; font-size: 18px; padding: 19px 30px; width: 730px;}
.questions-main {margin: 0 0 0 110px;}
.questions-main>div {margin-bottom: 10px;}
.questions-main p {margin-bottom: 10px;}
.questions-main p:last-child {margin-bottom: 0;}

<!DOCTYPE html> <html> <head> <title>Untitled</title> <meta charset="utf-8"> <style type="text/css"> .questions {padding: 85px 0 63px;} .questions .title2 {margin-bottom: 43px;} .block-main {display: none;} .block-title {position: relative; color: #000; width: 775px; font-size: 19px; line-height: 23px; margin-bottom: 10px; display: inline-block; *display: inline; *zoom: 1; text-decoration: none; cursor: pointer;} .block-title span {border-bottom: 1px dashed #b2b2b2; } .block-title:hover span, .opened .block-title span {border: 0;} .opened .block-title:before {content: ""; position: absolute; left: -23px; top: 10px; width: 0; border: 5px solid transparent; border-top: 4px solid #ff9898;} .block-title:before {content: ""; position: absolute; left: -23px; top: 10px; width: 0; border: 5px solid transparent; border-left: 4px solid #ff9898; border-top: 4px solid transparent;} .block-main {background: #fbf8ed; font-size: 18px; padding: 19px 30px; width: 730px;} .questions-main {margin: 0 0 0 110px;} .questions-main>div {margin-bottom: 10px;} .questions-main p {margin-bottom: 10px;} .questions-main p:last-child {margin-bottom: 0;} </style> <script> function hidetxt(a) { a = document.getElementById(a).style; a.display = "block" != a.display ? "block" : "none" }; </script> </script> </head> <body> <div class="questions-main"> <div> <a onclick="hidetxt('div1');" class="block-title" rel="nofollow" href="#"><span>Ссылка 1</span></a> <div class="block-main" id="div1"><p>Выпадающий текст 1</p> </div> </div> <div> <a onclick="hidetxt('div2'); return false;" class="block-title" rel="nofollow" href="#"><span>Ссылка 2</span></a> <div class="block-main" id="div2"> <p>Выпадающий текст 2</p> </div> </div> <div> <a onclick="hidetxt('div3'); return false;" class="block-title" rel="nofollow" href="#"><span>Ссылка 3</span></a> <div class="block-main" id="div3"> <p>Выпадающий текст 3</p> </div> </div> </div> </body> </html>