计算平面两点距离

- 中国WEB开发者网络 (http://www.webasp.net)
-- 网页特效 (http://www.webasp.net/javascript/)
--- 计算平面两点距离 (http://www.webasp.net/javascript/1/708.htm)
-- 发布日期： 2005-06-30
<!-- 网页特效代码由[中国WEB开发者网络:http://www.ChinaWebDev.com]提供！ -->
<!-- 要实现此效果需要 1 个步骤： -->

<!-- 第 1 步： -->
<!-- 把下面的代码加到<BODY></BODY>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>
<center>
<form>
<table border=3 cellspacing=2 cellpadding=5>
<tr>
<td colspan=4 align=center>计算平面两点之间的距离</td>
</tr>
<tr>
<td colspan=2 align=center>A点</td>
<td colspan=2 align=center>B点</td>
</tr>
<tr>
<td align=center>A点横坐标</td>
<td align=center>A点纵坐标</td>
<td align=center>B点横坐标</td>
<td align=center>B点纵坐标</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="计算距离" onClick="distance(this.form)"></td>
</tr>
<tr>
<td colspan=4 align=center><input type=text name=answer size=20></td>
</tr>
</table>
</form>
</center>

webasp.net