一个小小的js 里 算法错误

出现的小问题,记录下来.

 

  <input class="button_orange_2" type="button" name="sendfriend" value="发送" onclick="sendfri('<%=intFirstRow%>','<%=intLastRow%>','<%=listring%>')">

function sendfri(fir,las,listring){ //fir,las,lis, var varry=new Array(); var vlist = new Array(); vlist = listring.split(","); for (var i = fir,a=0; i < las; i++,a++) { if (document.getElementById("e_" + i).checked) { varry[a] =vlist[10-(las-i)]; alert(varry[a]); } } }

当 i=1 时

 

                     vlist[10-las+i]             和                     vlist[10-(las-i)]  

得到下标:                  99                                                  0