Revision: 44551
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at April 14, 2011 02:12 by wizard04
Initial Code
//returns event.button in both the W3C and Microsoft models
//in IE lte 8, a button combination (like 3==left+right) returns -1
function button(evt)
{
evt = evt || window.event;
var ms, w3c;
//in the W3C model, 0==left, 1==middle, 2==right
//in the Microsoft model, 1==left, 4==middle, 2==right
if(evt.which)
{
w3c = evt.which - 1;
ms = evt.which == 1 ? 1 /*left*/ : evt.which == 2 ? 4 /*middle*/ : 2 /*right*/;
}
else //IE lte 8
{
ms = evt.button; //actually, this would need to be: evt.button & !previous_evt_button
//otherwise, if evt.button == 3 (for example), it could be either the left or the right button
//since we can't reliably keep track of the previous evt.button, we will use -1 for the w3c value
// if ms is not 1, 4, or 2
w3c = ms == 1 ? 0 /*left*/ : ms == 4 ? 1 /*middle*/ : ms == 2 ? 2 /*right*/ : -1 /*unknown*/;
}
return {w3c: w3c, ms: ms};
};
Initial URL
Initial Description
Returns an object with the `event.button` values of both the W3C and Microsoft models.
Initial Title
Mouse Event Button
Initial Tags
javascript, event, button
Initial Language
JavaScript