var oldEvt2 = window.onload;

window.onload = function() {
	if (oldEvt2) oldEvt2();
		XVImgResize();
} 
	
function XVImgResize() {
	var ImageTags = document.body.getElementsByTagName("img");
	for(var i = 0; i < ImageTags.length; i++){	
		if(ImageTags[i].name.toUpperCase() == "PREVIEW") {
			var img = ImageTags[i];
			CalcHeight = 300;
			CalcWidth = 300;
			
			while(img.height > CalcHeight || img.width > CalcWidth){
				if(img.width > CalcWidth){
					img.height = (CalcWidth * img.height) / (img.width);
					img.width = CalcWidth;	
				}
				
				if(img.height > CalcHeight){
					img.width = (CalcHeight * img.width) / (img.height);
					img.height = CalcHeight;
				}
			}
		}	
	}	
}