function showModelsForManufacturer(mfrid, keyword) {
switch (mfrid){
						case "american_auger":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);
								selected = false;
		  						document.searchForm.keyword.options[1] = new Option('24-100', '"24-100, American Augers"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[2] = new Option('42-600', '"42-600, American Augers"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[3] = new Option('48-900', '"48-900, American Augers"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[4] = new Option('72-1200', '"72-1200, American Augers"', false, selected);
         				break;          		        		    
              		    case "astec_underground":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);
								selected = false;
		  						document.searchForm.keyword.options[1] = new Option('DD-3238', 'DD-3238, ASTEC Underground', false, selected);								
         				break;          		
              		    case "barbco":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);          
          						selected = false;
		  						document.searchForm.keyword.options[1] = new Option('80/90-15SC', '"80/90-15SC, Barbco"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[2] = new Option('48/60-750', '"48/60-750, Barbco"', false, selected);
         				break; 
						case "brandt":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);          
          						selected = false;
		  						document.searchForm.keyword.options[1] = new Option('Shaker', '"Shaker, Brandt"', false, selected);								
         				break; 
              		    case "case":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);  
         				break;         		
              		    case "ditch_witch":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);  
								selected = false;
		  						document.searchForm.keyword.options[1] = new Option('JT520', '"JT520, Ditch Witch"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[2] = new Option('JT920L', '"JT920L, Ditch Witch"', false, selected);
          						selected = false;
		  						document.searchForm.keyword.options[3] = new Option('JT2720', 'JT2720, Ditch Witch', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[4] = new Option('JT2720 Mach 1', '"JT2720 Mach 1, Ditch Witch"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[5] = new Option('JT4020 All Terrain', '"JT4020 All Terrain, Ditch Witch"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[5] = new Option('MM9', '"MM9, Ditch Witch"', false, selected);
         				break; 
              		    case "mclaughlin":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);
         				break;   
						case "michael_byrne":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);
								selected = false;
								document.searchForm.keyword.options[1] = new Option('24" Hydraulic', '"24in Hydraulic Machine, Michael Byrne"', false, selected);								
         				break;   
              		    case "ring_o_matic":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false); 
         				break;   		
              		    case "trencor":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);     
         				break;          		
              		    case "tt_pro":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);   
         				break;          		
              		    case "tt_technologies":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);
         				break;       	
              		    case "vacmaster":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);  
         				break;          		
              		    case "vactor":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);   
         				break;          		
              		    case "vactron":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);  
         				break;          		
              		    case "vermeer":
								document.searchForm.keyword.options.length = 0;
          						document.searchForm.keyword.options[0] = new Option('Any Model', '', false, false);          
          						selected = false;
		  						document.searchForm.keyword.options[1] = new Option('D7', '"D7, Vermeer"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[2] = new Option('D16x20', '"D16x20, Vermeer"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[3] = new Option('D16x20A', '"D16x20A, Vermeer"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[4] = new Option('D24x40A', '"D24x40A, Vermeer"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[5] = new Option('D50x100A', '"D50x100A, Vermeer"', false, selected);
								selected = false;
		  						document.searchForm.keyword.options[6] = new Option('ST750', '"ST750, Vermeer"', false, selected);
         				break; 
}
}