[Gunderak]

Theres this.

PHP Code:

function onActionLeftMouse() {
//Do Stuff.
} 


And also this

PHP Code:

function onMousedown(var) {
  if(var == "left"){
   if (mousex in |this.x+.5,this.x+2.5| && mousey in |this.y,this.y+3|) {
   //Do Stuff.
   }
 }
}