/******************************************************************
*	file		:		clientscript/opacity.js
*
******************************************************************/
function open_login()
{
	var overlayObj = _("loginbox_overlay");
	var loginObj = _("loginbox");
	
	overlayObj.style.display = 'block';
	loginObj.style.display = 'block';
	
	docdim = getPageSize();

	overlayObj.style.height = docdim[1] + 'px';
	
	return false;
}

function close_login()
{
	var overlayObj = _("loginbox_overlay");
	var loginObj = _("loginbox");
	
	overlayObj.style.display = 'none';
	loginObj.style.display = 'none';
	
	return false;
}



// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}
	
	

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}