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#2
leeqihero2019-12-25 15:39
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#3
leeqihero2019-12-26 14:50
 程序代码：<html> <head> <meta charset=UTF-8> <style> input[id='0'] { width:50; } </style> </head> <body> 加油:<input id=0>升<br> <select id=1> <option value=6.95>90#</option> <option value=7.44>93#</option> <option value=7.93>97#</option> </select><br> <select id=2> <option value=0.05>自助服务</option> <option value=0.03>协助服务</option> </select><br> <input type=button id=3 value=提交> <div id=4></div> </body> </html> <script> $=function(a){return document.getElementById(a)}; $(3).onclick=function(){ $(4).innerHTML='应付款额:'+($(0).value*$(1).value*(1-$(2).value)).toFixed(2)+'元'; $(0).value=''; }; </script> |