//image cache
videobut = new Image();
videobut.src = basedir + "images/main/ghss_btn_play_video.gif"
videobut2 = new Image();
videobut2.src = basedir + "images/main/ghss_btn_play_video.gif"
videobut3 = new Image();
videobut3.src = basedir + "images/main/ghss_btn_play_video.gif"
videobut4 = new Image();
videobut4.src = basedir + "images/main/ghss_btn_play_video.gif"
beginbut = new Image();
beginbut.src = basedir + "images/main/ghss_btn_begin.gif"
slidesbut = new Image();
slidesbut.src = basedir + "images/main/ghss_btn_view_slides.gif"
slidesbut2 = new Image();
slidesbut2.src = basedir + "images/main/ghss_btn_view_slides.gif"
closebut = new Image();
closebut.src = basedir + "images/main/ghss_popup_btn_close.gif"

videobut_o = new Image();
videobut_o.src = basedir + "images/main/ghss_btn_play_video_over.gif"
videobut2_o = new Image();
videobut2_o.src = basedir + "images/main/ghss_btn_play_video_over.gif"
videobut3_o = new Image();
videobut3_o.src = basedir + "images/main/ghss_btn_play_video_over.gif"
videobut4_o = new Image();
videobut4_o.src = basedir + "images/main/ghss_btn_play_video_over.gif"
beginbut_o = new Image();
beginbut_o.src = basedir + "images/main/ghss_btn_begin_over.gif"
slidesbut_o = new Image();
slidesbut_o.src = basedir + "images/main/ghss_btn_view_slides_over.gif"
slidesbut2_o = new Image();
slidesbut2_o.src = basedir + "images/main/ghss_btn_view_slides_over.gif"
closebut_o = new Image();
closebut_o.src = basedir + "images/main/ghss_popup_btn_close_over.gif"
//end image cache

function imgRoll(name,o) {
	document.images[name].src = eval(name+o+".src");
	// onmouseover="imgRoll('blah','_o')"
	// onmouseout="imgRoll('blah','')"
	}
	
function openWin(url,winname,w,h) {
	topWin = (screen.availHeight - h) / 2;
        leftWin = (screen.availWidth - w) / 2;
                if (navigator.platform.indexOf('mac') != -1){
                props = "menubar=yes,width="+w+",height="+h+",top="+topWin+",screenY="+topWin+",left="+leftWin+",screenX="+leftWin+",resizable=yes,scrollbars=yes"; }
                else {
                props = "width="+w+",height="+h+",top="+topWin+",screenY="+topWin+",left="+leftWin+",screenX="+leftWin+",resizable=yes,scrollbars=yes"; }
        var myWin = window.open(url,winname,props);
        myWin.focus();
}