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我有点麻烦,写文本的唯一行是document.write(“房间是”+墙+“平方英尺”+ BR);在我进入提示窗口之后,没有别的东西出现,我是否做错了什么?Javascript代码document.write
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
var BR = "<br />";
var galPaint = 100;
var galNeeded;
var length;
var width;
length = prompt("enter legnth of room in inches");
width = prompt("enter width of room in inches");
var perimeter = (Number(length)+Number(width))*2;
var walls = (perimeter*96)/Math.pow(12,2);
document.write("The room is"+ walls +"square feet"+ BR);
var doors;
var windows;
doors = prompt("Enter Number of doors");
windows = prompt("enter number of windows");
var sqfWindow = (Number(doors)*14);
var sqftDoor = (Number(windows)*20);
var totalSqft = (walls-(sqftWindow + sqftDoor));
galNeeded = (totalSqft/galpaint);
document.write("You need" + galNeeded + "gallons of paint" + BR);
</script>
</body>
</html>
注意:'document.write'永远不会(几乎没有)好的做法 –