pure javascript:
var ctrlKeyCode = 17;
var cntrlIsPressed = false;
document.addEventListener('keydown', function(event){
if(event.which=="17")
cntrlIsPressed = true;
});
document.addEventListener('keyup', function(){
if(event.which=="17")
cntrlIsPressed = true;
});
function selectMe(mouseButton)
{
if(cntrlIsPressed)
{
switch(mouseButton)
{
case 1:
alert("Cntrl + left click");
break;
case 2:
alert("Cntrl + right click");
break;
default:
break;
}
}
}