一个
输出为:
代码:
1 <!DOCTYPE html> 2 <html> 3 <script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script> 4 <meta charset="UTF-8"> 5 <title></title> 6 <style type="text/css"> 7 ul li{ 8 list-style:none; 9 padding:7px; 10 } 11 </style> 12 <body> 13 <scripe type="text/javascript"> 14 function anniu(){ 15 var a=document.getElementById("k2").value; 16 var b=document.getElementById("k3").value; 17 var radio=document.getElementByName("ra"); 18 19 for(i=0;i<radio.length;i++){ 20 if(radio[i].checked){ //checked选中事件 21 var fh=radio[i].value; 22 } 23 } 24 var result=0; 25 switch(fh){ 26 case '+': 27 result=parseFloat(a)+parseFloat(b); 28 break; 29 case '-': 30 result=parseFloat(a)-parseFloat(b); 31 break; 32 switch(fh){ 33 case '*': 34 result=parseFloat(a)*parseFloat(b); 35 break; 36 case '/': 37 result=parseFloat(a)/parseFloat(b); 38 break; 39 default: 40 alert('符号有误'); 41 break; 42 } 43 document.getElementById("k1").value=result; 44 } 45 46 </script> 47 <ul> 48 <li>结果:<input id="k1" disabled="disabled"/></li> 49 <li>第一个数:<input id="k2" type="text"/></li> 50 <li>第二个数:<input id="k3" type="text"></input></li> 51 <li id="fuhao"> 52 <input value='+' type="radio" name="ra">+</input> 53 <input value='-' type="radio" name="ra">-</input> 54 <input value='*' type="radio" name="ra">*</input> 55 <input value='/' type="radio" name="ra">/</input> 56 </li> 57 <li><button type='button' onclick="anniu()">提交</button></li> 58 </ul> 70 </body> 71 </html>