***综合类***给出两个点的座标可计算出两点间直线距离
把下列代码加到网页的<body></body>标签之间 从google下载我的照片管理软件要完成此效果需要两个步骤
第一步：把如下代码加入到<head>区域中
<script language="javascript">
<!-- begin
function distance(form) {
var x1 = eval(form.x1.value);
var y1 = eval(form.y1.value);
var x2 = eval(form.x2.value);
var y2 = eval(form.y2.value);
var xdiff = x2 - x1;
var ydiff = y2 - y1;
form.answer.value = math.pow((xdiff * xdiff + ydiff * ydiff), 0.5);
}
//end -->
</script>
第二步：把如下代码加入到<body>区域中
<center>
<form>
<table border=3 cellspacing=2 cellpadding=5>
<tr>
<td colspan=4 align=center height="18">求两点的直线距离</td>
</tr>
<tr>
<td colspan=2 align=center>点 a 座标</td>
<td colspan=2 align=center>点 b 座标</td>
</tr>
<tr>
<td align=center>x 轴</td>
<td align=center>y 轴</td>
<td align=center>x 轴</td>
<td align=center>y 轴</td>
</tr>
<tr>
<td align=center><input type=text name=x1 size=5></td>
<td align=center><input type=text name=y1 size=5></td>
<td align=center><input type=text name=x2 size=5></td>
<td align=center><input type=text name=y2 size=5></td>
</tr>
<tr>
<td colspan=4 align=center>
<input type=button value="得到结果" onclick="distance(this.form)">
</td>
</tr>
<tr>
<td colspan=4 align=center><input type=text name=answer size=20></td>
</tr>
</table>
</form>
</center>
--------------------------------------
http://www.huoyue.com.cn 活跃网，活跃人群的论坛，访问活跃网，将给您带来意想不到的收获，还可以免费为您开论坛，让您免费拥有与朋友、网友交流的论坛。你是年轻人吗？你活跃你就上！
页:
[1]