function height_window() { 

	var xScroll, yScroll;
	
    if (window.innerHeight && window.scrollMaxY) {	
	    xScroll = window.innerWidth + window.scrollMaxX;
	    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
	    if(document.documentElement.clientWidth){
		    windowWidth = document.documentElement.clientWidth; 
	    } else {
		    windowWidth = self.innerWidth;
	    }
	    windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
	    windowWidth = document.documentElement.clientWidth;
	    windowHeight = document.documentElement.clientHeight;
    } else if (document.body) { // other Explorers
	    windowWidth = document.body.clientWidth;
	    windowHeight = document.body.clientHeight;
    }	
	
    if(yScroll < windowHeight){
	    pageHeight = windowHeight;
    } else { 
	    pageHeight = yScroll;
    }

    if(xScroll < windowWidth){	
	    pageWidth = xScroll;		
    } else {
	    pageWidth = windowWidth;
    }
    
    return windowHeight;
}