JavaScript 问题求高手帮解答
有谁能解释下,下面JavaScript程式,特别是function backcolor()跟function getColor(),感谢
程序代码：
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title>any</title>
</head>
<body>
<table cellspacing=0 cellpadding=3 border=1 width="100%" align="center">
<TH>利用 Javascript 改變網頁背景顏色</TH></TABLE><BR>
<A href="#">移動滑鼠接近本行文字即可改變背景顏色!!!</A><p>
<hr>
<form>
請按下按鈕即可改變背景色顏色<p>
<input type="button" value="改變顏色">
</form>
<hr>
<form name="backcolorform">
手動選擇顏色.<p>
<table>
<tr>
<td><input type="radio" name="color" value="green">Green</td>
<td><input type="radio" name="color" value="aqua">Aqua</td>
<td><input type="radio" name="color" value="red">Red</td>
<td><input type="radio" name="color" value="olive">Olive</td>
</tr>
<tr>
<td><input type="radio" name="color" value="teal">Teal</td>
<td><input type="radio" name="color" value="blue">Blue</td>
<td><input type="radio" name="color" value="maroon">Maroon</td>
<td><input type="radio" name="color" value="navy">Navy</td>
</tr>
<tr>
<td><input type="radio" name="color" value="gray">Gray</td>
<td><input type="radio" name="color" value="lime">Lime</td>
<td><input type="radio" name="color" value="fuschia">Fuschia</td>
<td><input type="radio" name="color" value="white">White</td>
</tr>
<tr>
<td><input type="radio" name="color" value="purple">Purple</td>
<td><input type="radio" name="color" value="silver">Silver</td>
<td><input type="radio" name="color" value="yellow">Yellow</td>
<td><input type="radio" name="color" value="black">Black</td>
</tr>
</table>
</form>
</body>
<script src="client/js/work2.js"></script>
</html>
function backcolor(form){
temp = "";
for (var i = 0; i < 16; i++) {
temp = form.color[i].value;
if (form.color[i].checked){ document.bgColor = temp; }
}
}
function randombg() { document.bgColor = getColor(); }
function getColor(){
currentdate = new Date();
color = currentdate.getSeconds();
if (color > 44) color = color - 45;
else if (color > 29) color = color - 30;
else if (color > 15) color = color - 16;
if (color == 0 ) return "olive";
else if (color == 1 ) return "teal";
else if (color == 2 ) return "red";
else if (color == 3 ) return "blue";
else if (color == 4 ) return "maroon";
else if (color == 5 ) return "navy";
else if (color == 6 ) return "lime";
else if (color == 7 ) return "fuschia";
else if (color == 8 ) return "green";
else if (color == 9 ) return "purple";
else if (color == 10 ) return "gray";
else if (color == 11 ) return "yellow";
else if (color == 12 ) return "aqua";
else if (color == 13 ) return "black";
else if (color == 14 ) return "white";
else if (color == 15 ) return "silver";
}麻烦各位了
