// JavaScript Document

function getWindowHeight() 
{
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number') {
		windowHeight = window.innerHeight;
	}
	else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight = document.documentElement.clientHeight;
		}
		else {
			if (document.body && document.body.clientHeight) {
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}
		
		
function setFooter() 
{
	if (document.getElementById) {
		var windowHeight = getWindowHeight();
		if (windowHeight > 0) {
			var contentHeight = document.getElementById('all').offsetHeight;
			var footerElement = document.getElementById('footer');
			var footerHeight  = footerElement.offsetHeight;
			if (windowHeight - (contentHeight + footerHeight) >= 0) {
				footerElement.style.position = 'relative';
				footerElement.style.top = (windowHeight - (contentHeight + footerHeight)) + 'px';
			}
			else {
				footerElement.style.position = 'static';
			}
		}
	}
}



window.onload = function() 
{
	setFooter();
}
window.onresize = function() {
	setFooter();
}


// show-hide

var state = 'none';
var img_chg = '';
function showhide(layer_ref, img_ref) 
{
	
	//alert(img_ref);	
	
	if(document.getElementById(layer_ref).style.display == "none") {
		document.getElementById(layer_ref).style.display = "block";
		document.getElementById(img_ref).src = 'images/hide.gif';;
	}
	else {
		document.getElementById(layer_ref).style.display = "none";
		document.getElementById(img_ref).src = 'images/show.gif';
	}

}

// end show-hide