how to enlarge the datechooser window

hi all
browser:chrome 40.0

i am using SmartClient_v91p_2014-05-19_Evaluation to develop ipad web page, i found that the datechooser button was too small to be chosen on the ipad screen, is there anyway for me to enlarge the button and the window called out, so the users can easy to choose the button and the dates in the datechooser window.

code like this
{name: "date",type: "date",useTextField:true},