function openProjWin(sURL, sCat, sSubCat) 			//open a new window to display links
{
	sURL = sURL + '.html?' + sCat + '&' + sSubCat;
	//alert(sURL);
	if (!window.winObj)
	{
		winObj = window.open(sURL, "Projwin", "menubar=yes,scrollbars=yes,status=yes,resizable=yes,width=500,height=400");
	}
	else {
	        // has been defined
	        if (!winObj.closed)
	        {
	            // still open
	            winObj.focus();
	         	winObj = window.open(sURL, "Projwin", "menubar=yes,scrollbars=yes,status=yes,resizable=yes,width=500,height=400");
	        }
	        else
	        {
			    winObj = window.open(sURL, "Projwin", "menubar=yes,scrollbars=yes,status=yes,resizable=yes,width=500,height=400");
        	}
        }
}