// code from http://www.softcomplex.com/docs/get_window_size_and_scrollbar_position.html

    function f_clientWidth() {
	    return f_filterResults (
		    window.innerWidth ? window.innerWidth : 0,
		    document.documentElement ? document.documentElement.clientWidth : 0,
		    document.body ? document.body.clientWidth : 0
	    );
    }
    function f_clientHeight() {
	    return f_filterResults (
		    window.innerHeight ? window.innerHeight : 0,
		    document.documentElement ? document.documentElement.clientHeight : 0,
		    document.body ? document.body.clientHeight : 0
	    );
    }
    function f_scrollLeft() {
	    return f_filterResults (
		    window.pageXOffset ? window.pageXOffset : 0,
		    document.documentElement ? document.documentElement.scrollLeft : 0,
		    document.body ? document.body.scrollLeft : 0
	    );
    }
    function f_scrollTop() {
	    return f_filterResults (
		    window.pageYOffset ? window.pageYOffset : 0,
		    document.documentElement ? document.documentElement.scrollTop : 0,
		    document.body ? document.body.scrollTop : 0
	    );
    }
    // filters the above to get the correct result
    function f_filterResults(n_win, n_docel, n_body) {
	    var n_result = n_win ? n_win : 0;
	    if (n_docel && (!n_result || (n_result > n_docel)))
		    n_result = n_docel;
	    return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
    }


    
    
    
//---- MISC FUNCTIONS
//-----------------------

    function centreScreen(){
        // get window height - might not work in IE 6!!!
        winWidth = f_clientWidth();
        //alert(winWidth);
        //window.scrollTo(this.getX() - (window.innerWidth / 2), 0);
        window.scrollTo(((960-winWidth) / 2), 0);
    }


    function toTop(strDivId){
        //alert(strDivId);
        var objDiv = document.getElementById(strDivId);
        //objDiv.scrollTop = objDiv.scrollHeight;
        objDiv.scrollTop = 0;
    }