帮我看看JS问题

Question

function tijiao1()
     {
         var str3 = parseInt(document.getElementById("<%=this.DropDownList5.ClientID%>").value);
         if(str3!="")
         {
           
            if(document.getElementById("<%=this.RadioButton10.ClientID%>").checked)
             {
                 parent.bottomFrame.location='baobiao/baobiao12.aspx';
             }
              if(document.getElementById("<%=this.RadioButton12.ClientID%>").checked)
             {
                 parent.bottomFrame.location='baobiao/baobiao13.aspx';
             }
         }
         else
         {
            alert('对不起，您输入的查询条件不能为空！');
         }
     }
现在 STR3里有没有值 都直接走！else里没有起作用 这个是因为什么呀

Answer 1

function tijiao1() 
    { 
        var str3 = parseInt(document.getElementById(" <%=this.DropDownList5.ClientID%>").value); 
        alert(str3);//打印出结果看看便知!
        if(str3!="") 
        { 
          
            if(document.getElementById(" <%=this.RadioButton10.ClientID%>").checked) 
            { 
                parent.bottomFrame.location='baobiao/baobiao12.aspx'; 
            } 
              if(document.getElementById(" <%=this.RadioButton12.ClientID%>").checked) 
            { 
                parent.bottomFrame.location='baobiao/baobiao13.aspx'; 
            } 
        } 
        else 
        { 
            alert('对不起，您输入的查询条件不能为空！'); 
        } 
    } 

Answer 2

[code=HTML]function tijiao1() 
    { 
        var str3 = parseInt(document.getElementById(" <%=this.DropDownList5.ClientID%>").value); 
        alert(str3);//打印出结果看看便知!
        if(str3!="") 
        { 
          
            if(document.getElementById(" <%=this.RadioButton10.ClientID%>").checked) 
            { 
                parent.bottomFrame.location='baobiao/baobiao12.aspx'; 
            } 
              if(document.getElementById(" <%=this.RadioButton12.ClientID%>").checked) 
            { 
                parent.bottomFrame.location='baobiao/baobiao13.aspx'; 
            } 
        } 
        else 
        { 
            alert('对不起，您输入的查询条件不能为空！'); 
        } 
    } [/code]

Answer 3

弹出的是NaN  什么意思？

Answer 4

请问你为什么每个getElementById函数的参数前面都要加一个空格呢?

Answer 5

http://www.w3school.com.cn/tiy/t.asp?f=jseg_NaN

Answer 6

var str3 = parseInt(document.getElementById(" <%=this.DropDownList5.ClientID%>").value);
中间有空格,无法转换成Int