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The function addEventListener can be used to add multiple event handlers. However, it isn't fully cross-browser (IE, as usual, doesn't follow the rules). So, the easier way is to just call your two functions within a wrapper function and asign the wrapper as the handler:

function wrapperFunc() {  busSliderFunction();  phoneMsgFunction();}element.onclick= wrapperFunc;

Or if you want to use an anonymous function, you won't have to define wrapperFunc:

element.onclick= function() {  busSliderFunction();  phoneMsgFunction();}

Edited by ShadowMage
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