function GetObj(objName)
				  {
	              if(document.getElementById){
				   return eval('document.getElementById("' + objName + '")');
				  }
				  else if(document.layers){
				   return eval("document.layers['" + objName +"']");
				  }
				  else{
				  return eval('document.all.' + objName);
				  }
				  }
				  
				  function qh(i,fromi,fromj) //在表格tableformi,...,tableformj中显示talbei,隐空其余表格
				  {
				  for (var j=fromi ;j<=fromj; j++)
				  {
				  document.getElementById("table"+j).style.display='none';
				  //GetObj("td"+j).style.background = "url(images/2.gif)";
				  }
				  document.getElementById("table"+i).style.display='';
				  //GetObj("td"+i).style.background = "url(images/1.gif)";
				  }