onSelectStart This event handler will execute the instruction(s) when the user has started to select the element. syntax: document.onSelectStart = function() The onSelectStart Event Handler is used with the following: A ACRONYM ADDRESS 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 I IMG INS KBD LABEL LEGEND LI LISTING MARQUEE MENU OBJECT OL P PLAINTEXT PRE Q S SAMP SELECT SMALL SPAN STRIKE STRONG SUB SUP TABLE TBODY TD TEXTAREA TFOOT THEAD TR TT U UL VAR XMP document