function DrawImage(ImgD,wd,hg){
	var image=new Image();
	var iwidth = wd; //定义允许图片宽度，当宽度大于这个值时等比例缩小
	var iheight = hg; //定义允许图片高度，当宽度大于这个值时等比例缩小
	image.src=ImgD.src;
	if(image.width>0 && image.height>0){
		flag=true;
	if(image.width/image.height>= iwidth/iheight){
		if(image.width>iwidth){ 
			ImgD.width=iwidth;
			ImgD.height=(image.height*iwidth)/image.width;
		}else{
			ImgD.width=image.width; 
			ImgD.height=image.height;
		}
	
	}else{
		if(image.height>iheight){ 
			ImgD.height=iheight;
			ImgD.width=(image.width*iheight)/image.height; 
		}else{
			ImgD.width=image.width; 
			ImgD.height=image.height;
		}
		}
	}
} 
function viewImg(obj){
	var temp=Math.floor(Math.random()*5+1);
	obj.src='/news/images/temp/'+temp+'.gif';
}