function vShowObject(sObj,oLinkObj){if(document.getElementById&&(oObj=document.getElementById(sObj))){if(oObj.style.display=='block'){oObj.style.display='none';}else{oObj.style.display='block';}}}
function vCheckActivities(iActivity){oActivity1=document.getElementById('video_activity_1_uid');oActivity2=document.getElementById('video_activity_2_uid');iActivity1=oActivity1.options[oActivity1.options.selectedIndex].value;iActivity2=oActivity2.options[oActivity2.options.selectedIndex].value;if (iActivity1!=0&&iActivity1==iActivity2){if(iActivity==1){oActivity2.options.selectedIndex=0;}else{oActivity1.options.selectedIndex=0;}}}