var ar = [0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,'3..............................0',0,0,0,0,24];
ar = ar.join(',').replace(/0/g, '').split(',');
alert(ar);

------解决方案--------------------
var str1 = "0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,3..............................0,0,0,0,0,24" ;
var str2 = str1.replace(/0/g,'');
  alert(str2);

------解决方案--------------------
楼上两个有错，出现10 100 01这种就不行
JScript code

var ar = [0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,'3..............................0',0,0,0,0,24];
for(var i=ar.length-1;i>=0;i--)ar[i]=ar[i]||'';

------解决方案--------------------
var a="0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,3..............................0,0,0,0,0,24";
	var reg=/0,/g;
	a=a.replace(reg,",");
	alert(a);
先把数组join成逗号分隔的字符串，然后试试