<!--图片自动等比例缩放-->
var  flag=false; 
function  DrawImage(ImgD,wid,hei){  
     var  image=new  Image();  
     image.src=ImgD.src;  
     if(image.width>0  &&  image.height>0){  
       flag=true;  
       if(image.width/image.height>=  wid/hei){  
         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=ImgD.alt;  
         }  
       else{  
         if(image.height>hei){      
         ImgD.height=hei;  
         ImgD.width=(image.width*hei)/image.height;
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt=ImgD.alt;  
         }  
       }  
}  

<!--产品展示大图效果JS-->
function setTab(/*string*/name,/*int*/ itemCnt,/*int*/ curItem, /**/classHide, /**/classShow)
{
 for(i=1;i<=itemCnt;i++)
 {
  eval("document.getElementById('tab_" + name + "_" + i + "').className='" + classHide + "'");
 } 
 eval("document.getElementById('tab_" + name + "_" + curItem + "').className='" + classShow + "'");
 
 for(i=1;i<=itemCnt;i++)
 {
  eval("ele_hide = document.getElementById('con_" + name + "_" + i +"')");
  if(ele_hide) ele_hide.style.display = "none";
 }
 eval("ele_play = document.getElementById('con_" + name + "_" + curItem + "')");
 if(ele_play) ele_play.style.display = "block";
}

function Desc_dis()
{
 if (document.all.Description.style.display=='none')
 {
 document.all.Description.style.display='block'
 document.all.feedback.style.display='none'

 Desc_bg.className = "dise_feed_down";
 feed_bg.className = "dise_over";
 }else
 {
 document.all.Description.style.display='none'
 document.all.feedback.style.display='block'

 Desc_bg.className = "dise_over";
 feed_bg.className = "dise_feed_down";
 } 
}
function feed_dis()
{
 if (document.all.feedback.style.display=='none')
 {
	 document.all.Description.style.display='none';
	 document.all.feedback.style.display='block';

	 Desc_bg.className = "dise_over";
	 feed_bg.className = "dise_feed_down";
 }else
 {
	 document.all.Description.style.display='block';
	 document.all.feedback.style.display='none';

	 Desc_bg.className = "dise_feed_down";
	 feed_bg.className = "dise_over";
 }
}

function showInfoStyle(id,msg){
	var obj = document.getElementById(id);	
	obj.innerHTML = msg;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}