if (window.addEventListener) window.addEventListener('load', attachInputAction, false);
else window.attachEvent('onload', attachInputAction);

function attachInputAction()
{
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	
	var ernal = document.getElementsByTagName('input');
	var length = ernal.length;
	
	// purchase button background position for ie
	for (var i = 0; i < length; i++)
	{
		if (ernal[i].className == 'btn_purchase')
		{
			ernal[i].value = '';
			
			ernal[i].onmouseover = function()
			{
				this.style.backgroundPosition = '0 -27px';
			}
			ernal[i].onmouseout = function()
			{
				this.style.backgroundPosition = '0 0';
			}
		}
		else if (ernal[i].className == 'btn_confirm' || ernal[i].className == 'btn_send')
		{
			ernal[i].value = '';
			
			ernal[i].onmouseover = function()
			{
				this.style.backgroundPosition = '0 -60px';
			}
			ernal[i].onmouseout = function()
			{
				this.style.backgroundPosition = '0 0';
			}
		}
	}
	
	return false;
}