png图片透明ie6解决

// 图片透明
function setPng(img, w, h) {
	ua = window.navigator.userAgent.toLowerCase();
	if (!/msie/.test(ua))
		return;
	imgStyle = "display:inline-block;" + img.style.cssText;
	strNewHTML = "<span style=\"width:" + w + "px; height:" + h + "px;"
			+ imgStyle + ";"
			+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"
			+ img.src + "', sizingMethod='scale');\"></span>";
	img.outerHTML = strNewHTML;
}

图片添加onload时间,就OK

<img id="s_weather_img" src=""
							onload="javascript:setPng(this, 60, 50);" style="display: none;">

获取图片URL地址,需要传递节点对象,解析出图片url地址

function getImg(obj){
	var imgPng;
	ua = window.navigator.userAgent.toLowerCase();
	if(!/msie/.test(ua)){
		imgPng=obj.find("img").attr('src');
	}else{
		var style=obj.find("span").attr('style');
		var start=style.indexOf("'");
		style=style.substring(start+1);
		var end=style.indexOf("'");
		imgPng=style.substring(0,end);
	}
	
	return imgPng;
}