var art_contents = document.getElementsByClassName("art_content");
for (var i = 0; i < art_contents.length; i++)
{
	var maxWidth = 550;
	var input = art_contents[i].innerHTML;
	var re = /<img.[^>]*src(=| )(.[^> ]*)[^>]*>/gi;
	var output = input.replace(re, "<img src=$2 onclick=\"javascript:window.open(this.src);\" style=\"cursor: pointer\" onload=\"javascript:DrawImage(this," + maxWidth + ");\">");
	art_contents[i].innerHTML = output;
}
var art_contents = document.getElementsByClassName("art_content_2");
for (var i = 0; i < art_contents.length; i++)
{
	var maxWidth = 550;
	var input = art_contents[i].innerHTML;
	var re = /<img.[^>]*src(=| )(.[^> ]*)[^>]*>/gi;
	var output = input.replace(re, "<img src=$2 onclick=\"javascript:window.open(this.src);\" style=\"cursor: pointer\" onload=\"javascript:DrawImage(this," + maxWidth + ");\">");
	art_contents[i].innerHTML = output;
}
//ͼƬ¼ÓÔØ
var flag=false; 
function DrawImage(ImgD,ImgWidth){ 
	var image=new Image(); 
	image.src=ImgD.src; 
	if(image.width>0 && image.height>0){ 
		flag=true; 
		if(image.width>ImgWidth){ 
			ImgD.style.width=ImgWidth + "px"; 
			ImgD.style.height=(image.height*ImgWidth)/image.width + "px"; 
		}else{ 
			ImgD.style.width=image.width + "px"; 
			ImgD.style.height=image.height + "px"; 
		}  
	} 
}