var lastPosTop;
var lastMousePos;
var scrollPosX;
var scrollPosY;

function toggleDivs(div1Id, div2Id, triggerElementId, triggerText1, triggerText2){
	
	var div1 = document.getElementById(div1Id);
	var div2 = document.getElementById(div2Id);
	
	var trigger = document.getElementById(triggerElementId);
	
	if(div2.style.display == 'none'){
		
		div1.style.display = 'none';
		div2.style.display = 'block';
		
		trigger.className = trigger.className + ' close';
		trigger.innerHTML = triggerText2;
	}
	else {
		
		div1.style.display = 'block';
		div2.style.display = 'none';
		
		trigger.className = 'readmore';
		trigger.innerHTML = triggerText1;
	}
}


function hide(elementId){
	
	if(document.getElementById(elementId)){
		
		var targetElement = document.getElementById(elementId);
		
		targetElement.style.display = 'none';
	}
}


function show(elementId){
	
	if(document.getElementById(elementId)){
		
		var targetElement = document.getElementById(elementId);
		
		targetElement.style.display = 'block';
	}
}


function showAtScrollPosition(showElementId){
	
	if(document.getElementById(showElementId)){
		
		var targetElement = document.getElementById(showElementId);
		
		targetElement.style.display = 'block';
		
		setScrollXY();
		scrollTo(0,0);
	}
}


function scrollToLastPos(){
	
	scrollTo(0, scrollPosY);
}


function setScrollXY() {
    scrollPosX = 0, scrollPosY = 0;
    if( typeof( window.pageYOffset ) == 'number' ) {
        // Netscape
        scrollPosX = window.pageXOffset;
        scrollPosY = window.pageYOffset;
    } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
        // DOM
        scrollPosX = document.body.scrollLeft;
        scrollPosY = document.body.scrollTop;
    } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
        // IE6 standards compliant mode
        scrollPosX = document.documentElement.scrollLeft;
        scrollPosY = document.documentElement.scrollTop;
    }
}


function stretchOverlay(overlayElementId){
	
	var isIE6 = navigator.userAgent.toLowerCase().indexOf('msie 6') != -1;
	
	if(isIE6){
		
		document.getElementById(overlayElementId).style.height = document.body.offsetHeight;
	}
}