<!DOCTYPE html> <html> <head> <title> 事件</title> <script type="text/javascript"> function count(){ var one=parseInt(document.getElementById("txt1").value); var two=parseInt(document.getElementById("txt2").value); var san=parseInt(document.getElementById("select").value); var num=" "; while (san) { case = "+": num = one + two; break; vase = "-": num = one -two; break; case ="*": num = one * two; break; case ="/": num = one / two; break; } document.getElementById("fruit").value=num; } </script> </head> <body> <input type='text' id='txt1' /> <select id='select'> <option value='+'>+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type='text' id='txt2' /> <input type='button' value=' = ' onclick="count()" /> <!--通过 = 按钮来调用创建的函数,得到结果--> <input type='text' id='fruit' /> </body> </html>
李晓健
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李晓健
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