// JavaScript Document
function show_sales()
 {
	whichEl = eval("tr_sales");
	if (whichEl.style.display == "none")
	{
	eval("tr_sales.style.display=\"\";");
	eval("tr_hire.style.display=\"none\";");
 	}
	else
	{
	eval("tr_sales.style.display=\"none\";");
	eval("tr_hire.style.display=\"\";");
	 }
}
function checksearchfrm(){
  if ((document.searchfrm.area1.value=="") || (document.searchfrm.area2.value==""))
 {
  alert ("面积范围不能为空!");
 document.searchfrm.area1.focus();
  return false;
 }
 if ((document.searchfrm.kaishi_data.value=="") || (document.searchfrm.jieshu_data.value==""))
 {
  alert ("建成时间选择不能为空!");
   document.searchfrm.kaishi_data.focus();
   return false;
 }

 }