drop down menu

The reason the menu is in the incorrect place when you resize the window is because you have absolute positioning for your menu.

I went to the menu owners website and saw this example:
http://www.milonic.co.uk/menu/menusample.php?sampleid=21

I then was able to get your code to work by doing the following:

1.  Your menu_array.js needs to look like this:
/*
 Milonic DHTML Website Navigation Menu - Version 3.4
 Written by Andy Woolley - Copyright 2002 (c) Milonic Solutions Limited. All Rights Reserved.
 Please visit http://www.milonic.co.uk/menu or e-mail menu3@milonic.com for more information.

 The Free use of this menu is only available to Non-Profit, Educational & Personal web sites.
 Commercial and Corporate licenses  are available for use on all other web sites & Intranets.
 All Copyright notices MUST remain in place at ALL times and, please keep us informed of your
 intentions to use the menu and send us your URL.
*/


//The following line is critical for menu operation, and MUST APPEAR ONLY ONCE. If you have more than one menu_array.js file rem out this line in subsequent files
menunum=0;menus=new Array();_d=document;function addmenu(){menunum++;menus[menunum]=menu;}function dumpmenus(){mt="<scr"+"ipt language=JavaScript>";for(a=1;a<menus.length;a++){mt+=" menu"+a+"=menus["+a+"];"}mt+="<\/scr"+"ipt>";_d.write(mt)}
//Please leave the above line intact. The above also needs to be enabled if it not already enabled unless this file is part of a multi pack.



////////////////////////////////////
// Editable properties START here //
////////////////////////////////////

// Special effect string for IE5.5 or above please visit http://www.milonic.co.uk/menu/filters_sample.php for more filters
if(navigator.appVersion.indexOf("MSIE 6.0")>0)
{
    effect = "Fade(duration=0);Alpha(style=0,opacity=100)"
}
else
{
    effect = "Shadow(color='#000000', Direction=135, Strength=0)" // Stop IE5.5 bug when using more than one filter
}


timegap=500     // The time delay for menus to remain visible
followspeed=5       // Follow Scrolling speed
followrate=40       // Follow Scrolling Rate
suboffset_top=5;    // Sub menu offset Top position
suboffset_left=10;  // Sub menu offset Left position

style1=[            // style1 is an array of properties. You can have as many property arrays as you need. This means that menus can have their own style.
"999999",           // Mouse Off Font Color
"white",            // Mouse Off Background Color
"000000",           // Mouse On Font Color
"transparent",          // Mouse On Background Color
"transparent",          // Menu Border Color
11,             // Font Size in pixels
"normal",           // Font Style (italic or normal)
"bold",             // Font Weight (bold or normal)
"Verdana, Arial",   // Font Name
0,          // Menu Item Padding
"arrow.gif",        // Sub Menu Image (Leave this blank if not needed)
,           // 3D Border & Separator bar
,           // 3D High Color
,           // 3D Low Color
,           // Current Page Item Font Color (leave this blank to disable)
"800080",           // Current Page Item Background Color (leave this blank to disable)
,               // Top Bar image (Leave this blank to disable)
"transparent",          // Menu Header Font Color (Leave blank if headers are not needed)
"white",            // Menu Header Background Color (Leave blank if headers are not needed)
"transparent",          // Menu Item Separator Color
]


addmenu(menu=[              // This is the array that contains your menu properties and details
"mainmenu",         // Menu Name - This is needed in order for the menu to be called
,             // Menu Top - The Top position of the menu in pixels
,             // Menu Left - The Left position of the menu in pixels
,                    // Menu Width - Menus width in pixels
0,                  // Menu Border Width
,                   // Screen Position - here you can use "center;left;right;middle;top;bottom" or a combination of "center:middle"
style1,             // Properties Array - this is set higher up, as above
1,              // Always Visible - allows the menu item to be visible at all time (1=on/0=off)
,           // Alignment - sets the menu elements text alignment, values valid here are: left, right or center
,               // Filter - Text variable for setting transitional effects on menu activation - see above for more info
,                   // Follow Scrolling - Tells the menu item to follow the user down the screen (visible at all times) (1=on/0=off)
1,                  // Horizontal Menu - Tells the menu to become horizontal instead of top to bottom style (1=on/0=off)
,                   // Keep Alive - Keeps the menu visible until the user moves over another menu or clicks elsewhere on the page (1=on/0=off)
,                   // Position of TOP sub image left:center:right
,                   // Set the Overall Width of Horizontal Menu to 100% and height to the specified amount (Leave blank to disable)
,                   // Right To Left - Used in Hebrew for example. (1=on/0=off)
,                   // Open the Menus OnClick - leave blank for OnMouseover (1=on/0=off)
,                   // ID of the div you want to hide on MouseOver (useful for hiding form elements)
,                   // Background image for menu when BGColor set to transparent.
,                   // Scrollable Menu
,                   // Reserved for future use
,"<img src=images/home_btn_prospects.gif border=0>","show-menu=testing1",,"Animation",0

])
            addmenu(menu=["testing1",
        ,,,1,"",style1,,"center",effect,,,,,,,,,,,,
        ,"MS&nbsp;Program","http://www.socialwork.columbia.edu/",,"MS Program",1
                ,"PhD&nbsp;Program","http://www.columbia.edu/cu/ssw/phdprogram/",,"PhD Program",1
                ])



dumpmenus()


2.  Replace the first TD in your navigationtable in indexnew6.html as follows
  <table width="710" border="0" cellspacing="0" cellpadding="0" class="navigationtable">
  <tr>

  <td width="154" valign="top"><script language=JavaScript>PlaceMenu("mainmenu")</script></td>