js gets the mouse click position implementation ideas and code_javascript skills

function pointerX(event)
{
return event.pageX || (event.clientX (document.documentElement.scrollLeft || document.body.scrollLeft));
}

function pointerY(event)
{
return event .pageY || (event.clientY (document.documentElement.scrollTop || document.body.scrollTop));
}

function getPointPosition(event)
{
var x_px_scr = event.clientX;
var y_px_scr = event.clientY;
alert("X-axis offset relative to the current screen" x_px_scr);//relative to the device (PC or mobile device)
alert("Y-axis offset relative to the current screen" y_px_scr);//relative to the device (PC or mobile device)
var x_Px_page = pointerX(event);
var y_Px_page = pointerY(event);
alert("X-axis offset relative to the entire page" x_Px_page); //relative to the browser
alert("Y-axis offset relative to the entire page" y_Px_page); //Relative to the browser
}