var imgObj; 
var imgObjLeft;
var imgObjRight; 
function over(imgNum) {
    //if script is ready 
    if(menuReadyState) { 
        // Reset All Images 
        menuClosingFunction(); 
        // Get Button Image Object 
        if(ns4) { 
		    imgObj = document.layers["SchrodingerDIVToolBarPage"].document.images["b"+imgNum]; 
		} 
        else 
		{ 
		    imgObj = document.images["b"+imgNum]; 
		} 
        // Change Button Image For Rollover Effect
        imgObj.src = imgs[imgNum][1].src; 
		// Change Left Spacer Image (If Applicable)
		if(imgNum>0 && imgNum<=TPNNodes) {
			if(ns4) { 
				imgObjLeft = document.layers["SchrodingerDIVToolBarPage"].document.images["s"+(imgNum-1)]; 
			} 
    	    else 
			{
			    imgObjLeft = document.images["s"+(imgNum-1)]; 
			} 
			imgObjLeft.src = spacerImgs[(imgNum-1)][1].src; 
		}
		// Change Right Spacer Image (If Applicable)
		if(imgNum<TPNNodes) {
			if(ns4) { 
			    imgObjRight = document.layers["SchrodingerDIVToolBarPage"].document.images["s"+imgNum]; 
			} 
    	    else
			{
			    imgObjRight = document.images["s"+imgNum]; 
			} 
			imgObjRight.src = spacerImgs[imgNum][1].src;
		}	
        // Find Position Of Button Image 
        xPos = getRealLeft(imgObj); 
        yPos = getRealTop(imgObj); 
        // Activate Drop Down Menu With Returned Coordinates
		activateMenu(2,150,100); 
        activateMenu(imgNum,xPos,yPos+imgObj.height); 
    } 
}
function menuClosingFunction() { 
    //reset all images 
    for(i=0;i<=TPNNodes;i++){ 
        if(ns4) {
		    imgObj = document.layers["SchrodingerDIVToolBarPage"].document.images["b"+i];
		} 
        else
		{
		    imgObj = document.images["b"+i]; 
		} 
        imgObj.src = imgs[i][0].src; 
		if(i<TPNNodes) {
	        if(ns4) {
			    imgObjLeft = document.layers["SchrodingerDIVToolBarPage"].document.images["s"+i];
			} 
    	    else
			{
			    imgObjLeft = document.images["s"+i];
			} 
        	imgObjLeft.src = spacerImgs[i][0].src; 
		}
    } 
}
function MM_swapImgRestore() // v3.0
{
    var i, x, a = document.MM_sr;
    for(i = 0;a && i < a.length && (x = a[i]) && x.oSrc;i++) x.src = x.oSrc;
    window.status = 'This is a test';
} 
function MM_preloadImages() // v3.0
{
    var d = document;
    if (d.images)
    {
        if (!d.MM_p) d.MM_p = new Array();
        var i, j = d.MM_p.length, a = MM_preloadImages.arguments;
        for(i = 0; i < a.length; i++)
        if (a[i].indexOf("#") != 0)
        {
            d.MM_p[j] = new Image;
            d.MM_p[j++].src = a[i];
        } 
    } 
} 
function MM_findObj(n, d) // v4.01
{
    var p, i, x;
    if (!d) d = document;
    if ((p = n.indexOf("?")) > 0 && parent.frames.length)
    {
        d = parent.frames[n.substring(p + 1)].document;
        n = n.substring(0, p);
    } 
    if (!(x = d[n]) && d.all) x = d.all[n];
    for (i = 0;!x && i < d.forms.length;i++) x = d.forms[i][n];
    for(i = 0;!x && d.layers && i < d.layers.length;i++) x = MM_findObj(n, d.layers[i].document);
    if (!x && d.getElementById) x = d.getElementById(n);
    return x;
} 
function MM_swapImage() // v3.0
{
    var i, j = 0, x, a = MM_swapImage.arguments;
    document.MM_sr = new Array;
    for(i = 0;i < (a.length-2);i += 3)
    if ((x = MM_findObj(a[i])) != null)
    {
        document.MM_sr[j++] = x;
        if (!x.oSrc) x.oSrc = x.src;
        x.src = a[i + 2];
    } 
}