call onClick from JavaScript function -

i have created live search displays results in table row. row has onclick function executes process of selecting result. onclick function works fine mouse click want user can select up/down arrow key & enter too. want function set in onclick called other javascript function. please......

myelement.onclick = function() {     // called when myelement clicked } 

or just

myelement.click(); // clicks element 

and use onkeydown event call it, , check characters before click();

myfield.onkeydown = function() {     myelement.click(); }