How to Catch Matrix header(Title) click and double click events

hi

i am having a problem while catching matrix header(title)

click and double click events.

i want capture click event only when title(header) of matrix is clicked

i am capturing click using pval.colUID="title1" and event type=et_CLICK,and this event is not allowing me to capture double click event

and the code under click event is executing even when i am clicking on matrix column

CAN ANY ONE HELP ME

thanks and regards