简单时间问题

一个下拉列表    值有3和5    两个输入框 (默认为隐藏)  
当我选择3时   弹出一个输入框  输入框里显示的是从当天时间起的前三天
当我选择5时   弹出一个输入框  输入框里显示的是从当天时间起的前五天
谢谢了   着急用

解决方案 »

  1.   

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT=""><script>function dateShow(){
    var index = document.getElementById("888").options.selectedIndex;
    var indexValue = document.getElementById("888").options[index].text;
    if(indexValue != "" || indexValue != null){
    var today = new Date();

    today.setDate(today.getDate()-3)
    alert(today)
    }
    }
    </script>
    </HEAD><BODY>
    <select onChange="dateShow()" id="888">
    <option></option>
    <option >3</option>
    <option>5</option>
    </select>
    </BODY>
    </HTML>
      

  2.   


    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT=""><script>function dateShow(){
    var index = document.getElementById("888").options.selectedIndex;
    var indexValue = document.getElementById("888").options[index].text;
    if(indexValue != "" || indexValue != null){
    var today = new Date();

    today.setDate(today.getDate()-indexValue)
    if(index == 1){
    document.getElementById("t1").style.display="";
    document.getElementById("t2").style.display="none";
    document.getElementById("t1").value= today;
    }else{

    document.getElementById("t1").style.display="none";
    document.getElementById("t2").style.display="";
    document.getElementById("t2").value= today;
    }
    }
    }
    </script>
    </HEAD><BODY>
    <select onChange="dateShow()" id="888">
    <option></option>
    <option >3</option>
    <option>5</option>
    </select><input type="text" id="t1" value="" style="display:'none' ">
    <input type="text" id="t2" value="" style="display:'none' ">
    </BODY>
    </HTML>
      

  3.   

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT=""><script>function dateShow(){
    var index = document.getElementById("888").options.selectedIndex;
    var indexValue = document.getElementById("888").options[index].text;

    if(indexValue != "" && indexValue != null){
    alert(indexValue)
    var today = new Date();

    today.setDate(today.getDate()-indexValue)
    if(index == 1){
    document.getElementById("t1").style.display="";
    document.getElementById("t2").style.display="none";
    document.getElementById("t1").value= dateOut(today);
    }else{

    document.getElementById("t1").style.display="none";
    document.getElementById("t2").style.display="";
    document.getElementById("t2").value= dateOut(today);
    }
    }else{
    document.getElementById("t1").style.display="none";
    document.getElementById("t2").style.display="none";

    }
    }
    function dateOut(date){
    var outMonth = date.getMonth()+1;
    if(outMonth.toString().length == 1) outMonth = "0" + outMonth;
      var outDate = date.getFullYear()+"-"+outMonth+"-"+date.getDate();
    return outDate;
    }
    </script>
    </HEAD><BODY>
    <select onChange="dateShow()" id="888">
    <option></option>
    <option >3</option>
    <option>5</option>
    </select>
    <table>
    <tr><td height="50px">
    <input type="text" id="t1" value="" style="display:'none' "></td></tr>
    <tr><td>
    <input type="text" id="t2" value="" style="display:'none' "></td></tr>
    </table>
    </BODY>
    </HTML>
      

  4.   

    先谢谢     
    <select onChange="dateShow()" id="888">
    <option></option>
    <option >3</option>
    <option>5</option>
    <option>10</option>
    <option>最近一个月</option>
    </select>   假如是这样的呢
      

  5.   

    today.setDate(today.getDate()-indexValue)today.setMonth(today.getMonth()-1) 一个月today.setFullYear(today.getFullYear()-1) 一年
      

  6.   

    有问题    可否把html代码也加上  谢谢了