var windowWidth;
var windowHeight;
var pageWidth;
var pageHeight;

function getWindowDimensions()
{

	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;
	}




	if(document.body)
	{
		var test1 = document.body.scrollHeight;
		var test2 = document.body.offsetHeight
		if (test1 > test2) // all but Explorer Mac
		{
			pageWidth = document.body.scrollWidth;
			pageHeight = document.body.scrollHeight;
		}
		else // Explorer Mac;
		     //would also work in Explorer 6 Strict, Mozilla and Safari
		{
			pageWidth = document.body.offsetWidth;
			pageHeight = document.body.offsetHeight;
		}
	}
	else
	{
		pageWidth = windowWidth;
		pageHeight = windowHeight;
	}

}