应该没有限制，下面这段代码，运行长度正确，为888888，就是运行时慢些
<SCRIPT language="javascript">
function test()
{
var arr = new Array();
for(var i=0; i<888888; i++)
arr[i] = i;
alert(arr.length);
}
</SCRIPT>
<BODY onLoad="test()"></BODY>
<SCRIPT language="javascript">
function test()
{
var arr = new Array();
for(var i=0; i<888888; i++)
arr[i] = i;
alert(arr.length);
}
</SCRIPT>
<BODY onLoad="test()"></BODY>
function ItemClassStep(DepartmentID,WorkContent,ItemClassID)
{
this.DepartmentID=DepartmentID
this.WorkContent=WorkContent
this.ItemClassID=ItemClassID
}
var ItemClassStep_array=new Array()
</script>
<script language=javascript>
var ItemClassStep_array=new Array(4)
ItemClassStep_array[0]=new ItemClassStep("环保局","受理","00000191")
ItemClassStep_array[1]=new ItemClassStep("环保局","勘察","00000191")
ItemClassStep_array[2]=new ItemClassStep("环保局","审核","00000191")
ItemClassStep_array[3]=new ItemClassStep("环保局","批复或上报","00000191")
ItemClassStep_array[4]=new ItemClassStep("环保局","发证","00000191")
</script>
这个里面就会出问题
http://community.csdn.net/Expert/topic/3134/3134829.xml?temp=4.58926E-03