$(document).ready(function(){
	$('.fade').hover(
	function(){
		$(this).fadeTo(200,0.8);
	},
	function(){
		$(this).fadeTo(200,1);
	}
	);
});
if (window.XMLHttpRequest) {
 	// IE7, mozilla, safari, opera 9
} else {
 	// IE6, older browsers
	$(function(){
	$('#pagetop').exFixed(); // for IE6
	});
}
<!-- form btn -->
function btnConform(){
	var inputs = document.getElementsByTagName("input");
	for( var i=0,j=inputs.length; i<j; i++){
		var btn = inputs[i]; 
		if(btn.getAttribute("class") == "input_btn"){
			btn.onmouseover = function(){
				this.style.backgroundPosition = 'left -40px';
				return false;
			}
			btn.onmouseout = function(){
				this.style.backgroundPosition = 'left top';
				return false;
			}
		}
		if(btn.getAttribute("className") == "input_btn"){
			btn.onmouseover = function(){
				this.style.backgroundPosition = 'left -40px';
				return false;
			}
			btn.onmouseout = function(){
				this.style.backgroundPosition = 'left top';
				return false;
			}
		}
	}
}

window.onload = btnConform;