| @@ -48,7 +48,7 ContextMenu.prototype = { | |||
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48 | 48 | if (window.opera && e.altKey) { return; } |
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49 | 49 | if (Event.isLeftClick(e) || (navigator.appVersion.match(/\bMSIE\b/))) { |
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50 | 50 | var tr = Event.findElement(e, 'tr'); |
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51 | if (tr!=document && tr.hasClassName('hascontextmenu')) { | |
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51 | if (tr!=null && tr!=document && tr.hasClassName('hascontextmenu')) { | |
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52 | 52 | // a row was clicked, check if the click was on checkbox |
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53 | 53 | var box = Event.findElement(e, 'input'); |
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54 | 54 | if (box!=document && box!=undefined) { |
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