I am working on a web base app for my school with different versions of CSS for handheld, tablet and desktop. I am using media queries for this. The app is almost done and it works correctly on almost all browsers and android. The app looks awesome on Iphone/Ipad however buttons do not work making the app useless in these devices.
This is what I have:
//Source code
<div id="signinbutton" class="blue_button">Sign In</div>
//desktop.CSS
.blue_button {
    width: 130px;
    height: auto;
    padding: 8px;
    margin: 0% auto 20% auto;
    background-image:url(../../images/bluebar5.png);
    color: #FFF;
    text-align: center;
    font-family: "Lucida Sans Unicode", "Lucida Grande", Sans-Serif;
    font-size: 14pt;
    font-weight: bolder;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    cursor: default;
    }
.blue_button:hover {
    opacity: 0.7;
}
//Handheld.css (this overwrites css on desktop)
.blue_button {
    width: 260px;
    font-size: 18pt;
    background-image:url(../../images/bluebar6.png);
}
I tried applying the style to #signinbutton without success.
 
     
     
     
    