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脚本说明: 第一步:把如下代码加入<head>区域中 <script language="Javascript"> <!-- 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 randombackground(){ document.bgColor = getColor() } function getColor(){ currentdate = new Date() backgroundcolor = currentdate.getSeconds() if (backgroundcolor > 44) backgroundcolor = backgroundcolor - 45 else if (backgroundcolor > 29) backgroundcolor = backgroundcolor - 30 else if (backgroundcolor > 15) backgroundcolor = backgroundcolor - 16 if (backgroundcolor == 0 ) return "olive"; else if (backgroundcolor == 1 ) return "teal"; else if (backgroundcolor == 2 ) return "red"; else if (backgroundcolor == 3 ) return "blue"; else if (backgroundcolor == 4 ) return "maroon"; else if (backgroundcolor == 5 ) return "navy"; else if (backgroundcolor == 6 ) return "lime"; else if (backgroundcolor == 7 ) return "fuschia"; else if (backgroundcolor == 8 ) return "green"; else if (backgroundcolor == 9 ) return "purple"; else if (backgroundcolor == 10 ) return "gray"; else if (backgroundcolor == 11 ) return "yellow"; else if (backgroundcolor == 12 ) return "aqua"; else if (backgroundcolor == 13 ) return "black"; else if (backgroundcolor == 14 ) return "white"; else if (backgroundcolor == 15 ) return "silver"; } // --> </script> 第二步:把如下代码加入<body>区域中 <FORM> <input type="button" value="Random" onClick="randombackground()"> </form>