<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>购物简易计算器</title> <style> .Compute{ width:300px; height:400px; } </style> <script> function compute(op){ var num1,num2; num1=parseFloat(document.myform.txtNum1.value); num2=parseFloat(document.myform.txtNum2.value); if(op=="+") { document.myform.txtResult.value=num1+num2; } if(op=="-") { document.myform.txtResult.value=num1-num2; } if(op=="*") { document.myform.txtResult.value=num1*num2; } if(op=="/") { document.myform.txtResult.value=num1/num2; } } </script> </head> <body> <section class="Compute"> <form action=""method="post" name="myform"id="myform"> <h3>购物简易计算器</h3> <p> 第一个数: <input type="text" name="txtNum1"class="textBaroder"id="txtNum1"size="25"/> <p>第二个数: <input type="text" name="txtNum2"class="textBaroder"id="txtNum2"size="25"/> </p> <p> <input type="button"name="addButton2"id="addButton2"value="+"style="width:63px;height:20px;"onClick=compute("+"); /> <input type="button"name="subButton2"id="subButton2"value="-" style="width:63px;height:20px;"onClick=compute("-"); /> <input type="button"name="mulButton2"id="mulButton2"value="*" style="width:63px;height:20px;"onClick=compute("*"); /> <input type="button"name="divButton2"id="divButton2"value="/" style="width:63px;height:20px;"onClick=compute("/"); /> </p> <p>计算结果: <input type="text"name="txtResult"class="textBaroder" id="txtResult"size="25"/> </p> </form> </section> </body></html>