Remove the text from combobox when click

I using dhtmlXCombo for search channels, intially when page load i do setText by z.setComboText(‘Search channel’);



now i need to clear Text ‘Search channel’ set previosly on mouse click, is this possible



Is this possible and how do i go about doing this ?



Thanking in advance for all good work DHTMLX is doing



Nixon

The next must provide necessary behavior

combo.attachEvent(“onOpen”,function(){
combo.setComboText("");
return true;
})