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copied!<p>Your code can be refined more.</p> <p>But before that, you may want to use the "official" way of detecting the version of IE: (<a href="http://msdn.microsoft.com/en-us/library/ms537509%28v=vs.85%29.aspx" rel="nofollow">From Detecting Internet Explorer More Effectively</a>)</p> <pre><code>function getInternetExplorerVersion() // Returns the version of Internet Explorer or a -1 // (indicating the use of another browser). { var rv = -1; // Return value assumes failure. if (navigator.appName == 'Microsoft Internet Explorer') { var ua = navigator.userAgent; var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})"); if (re.exec(ua) != null) rv = parseFloat( RegExp.$1 ); } return rv; } </code></pre> <p>Now, lets work on the logic:</p> <ul> <li>If the browser is IE6 or lower it will use "horarios2.png" for the img src and no other. </li> <li>And if its any other browser that it will check the weekday(0-6) so that it will fill in the specific image for each day. <ul> <li>From Monday(1) to Wensday(3) the image is suposed to be "quarta.png". </li> <li>The other day's have their own image </li> </ul></li> </ul> <p>:</p> <pre><code>function horario () { var imageName = ""; if(getInternetExplorerVersion() <= 6) { imageName = "img/horarios2.png"; return; } var date = new Date(); var weekday = (date.getDay()); switch(weekday) { case 0: imageName = "img/domingo.png"; break; case 1: case 2: case 3: imageName = "img/quarta.png"; break; case 4: imageName = "img/quinta.png"; break; case 5: imageName = "img/sexta.png"; break; case 6: imageName = "img/sabado.png"; break; default: imageName = "img/horarios2.png"; } document.getElementById('horarios').src = imageName; } </code></pre>

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