提示：您可以先修改部分代碼再運行
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title> 知道兩點的座標電腦出他們之間的距離</title></head><body><SCRIPT LANGUAGE="JavaScript"><!-- Beginfunction 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>計算平面兩點之間的距離</td></tr><tr><td colspan=2 align=center>A點</td><td colspan=2 align=center>B點</td></tr><tr><td align=center>A點橫座標</td><td align=center>A點縱座標</td><td align=center>B點橫座標</td><td align=center>B點縱座標</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="計算距離" onClick="distance(this.form)"></td></tr><tr><td colspan=4 align=center><input type=text name=answer size=20></td></tr></table></form></center></body></html>
提示：您可以先修改部分代碼再運行
