function getObj(objId) {
 return document.getElementById(objId);
}
function showHide(node,objname){
    var obj = getObj(objname);
    if(obj.style.display == "none"){
	    obj.style.display = "block";
		node.childNodes[0].src = "img/yy1.gif";
	}else{
		obj.style.display = "none";
		node.childNodes[0].src = "img/xx1.gif";
	}
}

function showHideT(node,objname){
    var obj = getObj(objname);
    if(obj.style.display == "none"){
	    obj.style.display = "block";
		node.childNodes[0].src = "img/fgg1.gif";
	}else{
		obj.style.display = "none";
		node.childNodes[0].src = "img/fgg2.gif";
	}
}


function showHide3(node,objname){
    var obj = getObj(objname);
	var objtu = getObj(node);
    if(obj.style.display == "none"){
	    obj.style.display = "block";
		objtu.src = "img/bg_t4.jpg";
	}else{
		obj.style.display = "none";
		objtu.src = "img/bg_t1.jpg";
	}
}
var fgg=0; 
var flag=false; 

function DrawImage(ImgD,wid,hig){ 
 var image=new Image(); 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 
  flag=true; 
  if(image.width/image.height>= 1){ 
   if(image.width>wid){
    ImgD.width=wid; 
    ImgD.height=(image.height*wid)/image.width; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看..."; 
  } 
  else{ 
   if(image.height>hig){
    ImgD.height=hig; 
    ImgD.width=(image.width*hig)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看..."; 
  } 
 }
}