onMouseUp This event handler will execute the instruction(s) when a button on the mouse has been pressed and released. syntax: document.onMouseUp = function() The onMouseUp Event Handler is used with the following: A ACRONYM ADDRESS APPLET AREA B BIG BLOCKQUOTE BODY BUTTON CAPTION CENTER CITE CODE DD DEL DFN DIR DIV DL DT EM FIELDSET FONT FORM H1 H2 H3 H4 H5 H6 HR I IMG INS KBD LABEL LEGEND LI LISTING MAP MARQUEE MENU P PLAINTEXT PRE Q S SAMP SELECT SMALL SPAN STRIKE STRONG SUB SUP TABLE TBODY TD TEXTAREA TFOOT TH THEAD TR TT U UL VAR XMP button checkbox document fileUpload layer password radio reset submit text