//png图像透明
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6. 
{ 
    var arVersion = navigator.appVersion.split("MSIE") 
    var version = parseFloat(arVersion[1]) 
    if ((version >= 5.5) && (document.body.filters)) 
    { 
       for(var j=0; j<document.images.length; j++) 
       { 
          var img = document.images[j] 
          var imgName = img.src.toUpperCase() 
          if (imgName.substring(imgName.length-3, imgName.length) == "PNG") 
          { 
             var imgID = (img.id) ? "id='" + img.id + "' " : "" 
             var imgClass = (img.className) ? "class='" + img.className + "' " : "" 
             var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' " 
             var imgStyle = "display:inline-block;" + img.style.cssText 
             if (img.align == "left") imgStyle = "float:left;" + imgStyle 
             if (img.align == "right") imgStyle = "float:right;" + imgStyle 
             if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle 
             var strNewHTML = "<span " + imgID + imgClass + imgTitle 
             + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" 
             + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" 
             + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
             img.outerHTML = strNewHTML 
             j = j-1 
          } 
       } 
    }    
} 
window.attachEvent("onload", correctPNG); 
//###################################################################################
function   ismail(mail){  
  return(new   RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/).test(mail));  
}  
//###################################################################################
function flash(url, width, height){
	document.write('<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="' + width + '" height="' + height + '" VIEWASTEXT>');
	document.write('<param name="movie" value="' + url +'">');
	document.write('<param name="quality" value="high">');
	document.write('<PARAM NAME="wmode" VALUE="transparent">');
	document.write('<PARAM NAME=menu VALUE="false">');
	document.write('<embed src="' + url +'" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="' + width + '" height="' + height + '"></embed>');
	document.write('</object>');
}
function changpic(v,s){//更改图片
document.getElementById(v).src=s;
}
function update_cart(obb,id){//更新购物车
 if(obb>0){
  mycart.action="buy.php?mid="+id+'&num='+obb;
  mycart.submit();
 }
}
function add_cart(form,id){//加入到购物车
 if(form.num.value>0){
  form.action="buy.php?id="+id;
  form.submit();
 }
}
function show_css(myid){//更改图片
	if(document.getElementById(myid).style.display==""){
		document.getElementById(myid).style.display="none"
	}else{
		document.getElementById(myid).style.display=""
	}
}