function imgzoom(img){
var a=new Image();

a.src=img.src

if(a.width >= 500)
{
	img.style.width=500;
	img.style.height= 500*a.height/a.width;
//img.style.width=500;
}
if (a.height >=500)
{
	img.style.height=500;
	img.style.width= 500*a.width/a.height;
}
return false;
}
function imgzoom2(img){
var a=new Image();

a.src=img.src


img.style.width=350;

img.style.height=235;

return false;
}