function newwindow(img) 
{ 
	TargetImage = new Image(); 
	TargetImage.src = (img); 
	CheckImage(img);
} 
function CheckImage(img) 
{ 
if(TargetImage.width!=0 && TargetImage.height!=0){ 
		ViewImage(img); 
	} else { 
		setTimeout("CheckImage('"+img+"')",1); 
	} 
} 
function ViewImage(img) 
{ 
	img_width = TargetImage.width+20; 
	img_height = TargetImage.height+25; 
	window.open(img,"newWindow", "width="+img_width+",height="+img_height+",resizable=1");
}