用document.getElementsByName获得的值怎么用逗号分开？

Question

var t="";
l=document.getElementsByName(a);
                for(i=0;i<l.length;i++)  
                {  
                    if(l[i].value)  
                    {//如果有值，这里怎么写将他们用逗号分开赋予t？如果用t+=l[i].value+"，"那最后一个也有逗号
      
                     }                                                                  
                }

Answer 1

var t="";
var array = [];
    l=document.getElementsByName(a);
                for(i=0;i<l.length;i++)  
                {  
                    if(l[i].value)  
                    {//如果有值，这里怎么写将他们用逗号分开赋予t？如果用t+=l[i].value+"，"那最后一个也有逗号
                         array.push(l[i].value)
                     }                                                                  
                }
                t = array.join(",")

Answer 2

var t="";
    l=document.getElementsByName(a);
                for(i=0;i<l.length;i++)  
                {  
                    if(l[i].value)  
                    {//如果有值，这里怎么写将他们用逗号分开赋予t？如果用t+=l[i].value+"，"那最后一个也有逗号
                     t+=l[i].value;
                     if (i!=l.length)
                     {
                       t+=","
                      }
                     }                                                                  
                }
循环到最后一次的时候不要加，就行了

Answer 3

  var text = $("#" + obj.RegionCheckBoxListPanel + " :checkbox[checked]").map(function () {
            return $(this).attr("text");
        }).get().join(",");

Answer 4

1楼正解
关键在于
var a = new Array()
a.push(value);
a.join(",");