<script language="javascript">
function checkAll(form1,status){
var elements = form1.getElementsByTagName('input');
for(var i=0; i<elements.length; i++){
if(elements[i].type == 'checkbox'){
if(elements[i].checked==false){
elements[i].checked=true;
}
}
}
}
</script>
<td colspan="5" align="center" bgcolor="#FFFFFF"><img src="images/_01.jpg" onclick="checkAll(form1,status)" width="60" height="25" /> <img src="images/_08.jpg" onclick="switchAll(form1,status)" width="60" height="25" /> <img src="images/_11.jpg" width="60" height="25" onclick="uncheckAll(form1,status)" /> </td>
这里面checkAll(form1,status),是在传递参数,我想知道参数status,是从哪里来的?,是系统默认变量吗