function a(i){
		b(i);
	}
	function b(i){
		switch(i){
			case 1:
			document.getElementById("js").style.display="block";
			document.getElementById("js1").style.display="none";
			document.getElementById("js2").style.display="none";
			break;
			case 2:
			document.getElementById("js").style.display="none";
			document.getElementById("js1").style.display="block";
			document.getElementById("js2").style.display="none";
			break;
			case 3:
			document.getElementById("js").style.display="none";
			document.getElementById("js1").style.display="none";
			document.getElementById("js2").style.display="block";
			break;

		}
	}
	function ulShow()
{
    
        
        if(document.getElementById("show").style.display == "none")
        {
            document.getElementById("show").style.display = "block";
            
        }
        else
        {
          document.getElementById("show").style.display = "none";
     
         
        }
    }
    
  
function t(i){
		p(i);
	}
	function p(i){
		switch(i){
			case 1:
			document.getElementById("jstt").style.display="block";
			document.getElementById("jstt1").style.display="none";
			document.getElementById("jstt2").style.display="none";
			document.getElementById("jstt3").style.display="none";
			break;
			case 2:
			document.getElementById("jstt").style.display="none";
			document.getElementById("jstt1").style.display="block";
			document.getElementById("jstt2").style.display="none";
			document.getElementById("jstt3").style.display="none";
			break;
			case 3:
			document.getElementById("jstt").style.display="none";
			document.getElementById("jstt1").style.display="none";
			document.getElementById("jstt2").style.display="block";
			document.getElementById("jstt3").style.display="none";
			break;
			case 4:
			document.getElementById("jstt").style.display="none";
			document.getElementById("jstt1").style.display="none";
			document.getElementById("jstt2").style.display="none";
			document.getElementById("jstt3").style.display="block";
			break;
		}
	}
	function qingkong()
	{
	   document.getElementById("lyb_nr").value="";
	}
	
	function submit()
	{
//     	boolean result = true;
 alert('ÇëÌîдÆÀÂÛÄÚÈÝ');
	
	   if(document.getElementById("lyb_nr").value=="")
	   {
	      alert('ÇëÌîдÆÀÂÛÄÚÈÝ');
	      
//	      result= false;
	   }
	   if(document.getElementById("txtCommentsName").value=="")
	   {
	      alert('ÇëÌîдêdzÆ');
	      
//	       result= false;
	   }
	   
//	   return result;
	}
	<!-- 
// ˵Ã÷£ºÓà JavaScript ʵÏÖÍøҳͼƬµÈ±ÈÀýËõ·Å 
function DrawImage(ImgD,FitWidth,FitHeight) 
{ 
var image=new Image(); 
image.src=ImgD.src; 
if(image.width>0 && image.height>0) 
{ 
if(image.width/image.height>= FitWidth/FitHeight) 
{ 
if(image.width>FitWidth) 
{ 
ImgD.width=FitWidth; 
ImgD.height=(image.height*FitWidth)/image.width; 
} 
else 
{ 
ImgD.width=image.width; 
ImgD.height=image.height; 
} 
} 
else 
{ 
if(image.height>FitHeight) 
{ 
ImgD.height=FitHeight; 
ImgD.width=(image.width*FitHeight)/image.height; 
} 
else 
{ 
ImgD.width=image.width; 
ImgD.height=image.height; 
} 
} 
} 
} 
//-->