[ИП][лаб4] Промена на позадина

<html>
<head>
<meta charset="UTF-8" />
<title>Zadaca 3</title>
<script type="text/javascript">
function getSelected() {
    var val;
    var buttons = document.getElementsByName("type");
    for(var i = 0; i < buttons.length; ++i) {
        if(buttons[i].checked)
            return buttons[i].value.trim();
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function changeBackground() {
    var type = document.getElementById("type");
    var val = document.getElementById("value");
    if(getSelected() == "color") {
        document.body.style.background = val.value;
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</script>
</head>
<body>
<form method="POST" onsubmit="return changeBackground();">
<table width="400" border="0" cellspacing="2" cellpadding="2">
<tr>
    <th colspan="2"><h1>Промена на позадина</h1></th>
</tr>
<tr>
    <td colspan="2" align="center">
        <input type="radio" name="type" value="color" id="type" /> Color
        <input type="radio" name="type" value="image" id="type" /> Image
    </td>
</tr>
<tr>
    <td>Value:</td>
    <td><input type="text" name="value" id="value" size="25" /></td>
</tr>
<tr>
    <td colspan="2" align="center"><input type="submit" value="Промени" /></td>
</tr>
</table>
</form>
</body>
</html>