search control with Up and down arrow

hey....i apologize for not being clear on this one. By Up and down arrow i meant, i will put arrow image near search control which user can click to search.
And about event.preventdefault : i am calling this after capturing keystroke for Enter which means once enter is clicked i give call to my search method and also fire event.preventDefault so that it do not submit the form.
Somthing like this :

Find <input id=\"FindID\" type =\"text\" onkeydown =\"fsearchkey(event)\" önkeyup =\"fsearchkey(event)\" > </input>";

function fsearchkey(event) {
if (event.keyCode == 13) {
event.preventDefault();
fsearch();
}
I have tried Keypress event as well.