/*----------------------------------------------------------
  -- 目的： Form方式排序,排序字段，排序顺序都隐含
  -- 输入： 
  -- 返回： 
-----------------------------------------------------------*/ 
function ChangeOrder(){
	var o=document.forms;
	var i=o.length-1;
	var sOrder=o[i].sSortOrder.value;
	sOrder.toLowerCase();
	if (sOrder=="desc") {
		sOrder="";
	} else {
		sOrder="desc";
	}
	o[i].sSortOrder.value=sOrder;
}

function SetOrder(iField){
	var o=document.forms;
	var i=o.length-1;
	if (o[i].iSortField.value==iField) {
		ChangeOrder();
	}
	o[i].iSortField.value=iField;
	o[i].submit();
}

function ShowSort() {
	var o=document.forms;
	var i=o.length-1;
	var sOrder=o[i].sSortOrder.value;
	sOrder.toLowerCase();
	var s=(sOrder=="desc"?"↓":"↑");
	document.all.item("th"+o[i].iSortField.value.toString(),0).innerText+=s;
	if (document.all.item("th"+o[i].iSortField.value.toString()).length>1) {
		document.all.item("th"+o[i].iSortField.value.toString(),1).innerText+=s;
	}	
}