@media only screen and (max-width: 500px){ 
		   img.image1{
			 display: none;
		   }

		   img.image2{
			 display: block;
			 width:100%;
		   }
		   body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td { 
			margin:0;
			padding:0;
			}
			html,body {
				margin:0;
				padding:0;
			}
		}
		@media only screen and (min-width: 501px){ 
			body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td { 
				margin:0;
				padding:0;
			}
			html,body {
				margin:0;
				padding:0;
			}
		   img.image1{
			 display: block;
			 width:100%;
		   }

		   img.image2{
			 display: none;
		   }
		}