function $(objID){return document.getElementById(objID);}
function ChkForm(oForm)
{
	switch (oForm.name)
	{
	case "bystation":
		if (oForm.stationname.value=="")
		{
			oForm.stationname.focus();
			alert("车站名不能为空啊");
			return false;
		}
		break;
	case "bytrain":
		if (oForm.trainname.value=="")
		{
			oForm.trainname.focus();
			alert("车次名不能为空啊");
			return false;
		}
		break;
	case "byroute":
		if (oForm.from.value=="")
		{
			oForm.from.focus();
			alert("始发站名不能为空啊");
			return false;
		}
		if (oForm.to.value=="")
		{
			oForm.to.focus();
			alert("终点站名不能为空啊");
			return false;
		}
		if (oForm.to.value==oForm.from.value)
		{
			oForm.to.focus();
			alert("站名不能相同啊");
			return false;
		}
		break;
	}
	//alert("暂未开放！");
	//return false;
}

function th_color(s){
  var s = $(s);  
  var hx = s.getElementsByTagName("th");
  var totalno = hx.length;
  for(i=1;i<totalno;i++){
      hx[i].onmousemove=function(){this.style.backgroundColor='#E6F2E7';}
      hx[i].onmouseout=function(){this.style.backgroundColor='';}
  }
}
function tr_color(s){
  var s = $(s);  
  var hx = s.getElementsByTagName("tr");
  var totalno = hx.length;
  for(i=0;i<totalno;i++){
      hx[i].onmousemove=function(){this.style.backgroundColor='#E6F2E7';}
      hx[i].onmouseout=function(){this.style.backgroundColor='';}
  }
}