Shaman
2015-01-18 14:35
<!DOCTYPE html> <html> <head> <title> 事件</title> <script type="text/javascript"> function count(){ var txt1=document.getElementById('txt1').value; var txt2=document.getElementById('txt2').value; var oValue=document.getElementById('select').value; var result=0; switch(oValue) { case '+': result=parseInt(txt1)+parseInt(txt2); break; case '-': result=parseInt(txt1)-parseInt(txt2); break; case '*': result=parseInt(txt1)*parseInt(txt2); break; case '/': result=parseInt(txt1)/parseInt(txt2); break; } document.getElementById('fruit').value=result; } </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>
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