Auto-Suggested Textbox like google auto suggest

I need to create a Auto suggests Textboox like in 
 http://www.**--****.com/ 
I have completed this using AJAX.NET for Framework 1.1 . I have some design 
issues after the data is populated. 

For me the problem is I am getting more space after the item is selected. 
And the items are displayed in a combo when i am going for another search / 
selection without refreshing the page. 
I am expecting a same output as google's auto suggested textbox.

see my work at  http://www.**--****.com/ 
 
Please let me know if you get any on this.

The below is the javascript which helps to display the text box and the combo

			//matches select
			var matcheList = document.getElementById("matches");

			//called by the onKeyUp javascript event on the input
			function FindMatches(searchCriteria)
			{
				if (searchCriteria)
				{
					//SearchComplection is defined by Ajax.Net because that's the name of 
the type we registered
					NewOrder.FindMatches(searchCriteria, FindMatches_CallBack);
				}
				else
				{
					//clear the states dropdown
					matcheList.style.visibility = "hidden";
				}
			}
			//callback we told Ajax.Net to pass the response tos
			function FindMatches_CallBack(response)
			{
			//if the server side code threw an exception
				if (response.error != null)
				{    
					alert(response.error); //we should probably do better than this
					return;
				}  
				  
			//if we didn't get what we expect, or didn't get any matches  
				if (!response.value  || response.value.length == 0)
				{
					matcheList.style.visibility = "hidden";
					return;
				}
				  
				matcheList.style.visibility = "visible";
				matcheList.options.length = 0; //reset the states dropdown    
				matcheList.size = response.value.length; //dynamically set the size of 
the select box   
				for (var i = 0; i < response.value.length; ++i)
				{
					matcheList.options[matcheList.options.length] = new 
Option(response.value[i]);       
				}  
			}

			//called when a match item is selected from the list
			function MatchSelected(matches)
			{
				var state = document.getElementById("state");
				var divDisp = document.getElementById("divList");
				state.value = matches.options[matches.selectedIndex].text;
				matcheList.style.visibility = "hidden";
				//document.frmOrder.txtPClaimNo.focus();
				
				matcheList.style.height="40px"
				
				divDisp.style.visibility = "hidden";

				selected = matcheList.options.selectedIndex;
				value = state.value

				if (selected !=0 || selected ==0)
				{		
					count=3
					for (var i = 0, oldpos = -1; i<count-1; i++)
					{
						pos = value.indexOf(',',oldpos+1);
						data = value.substring(oldpos+1,pos);
						frmOrder.elements['txtC' + i].value = value.substring(oldpos+1,pos);
						oldpos = pos;
					}
					frmOrder.elements['txtC' + i].value = 
value.substring(oldpos+1,value.length)	
				}
			}
 
Thanks
Kumar