达到规则后停止iMacros脚本

Question

如果已达到特定规则，我应该在iMacros脚本中使用哪种函数/变量以使其停止执行？例如，我想设置一个！VAR以在打开TAB T = 3时停止脚本：

VERSION BUILD=12.0.501.6698

TAB T=1 
TAB CLOSEALLOTHERS 
URL GOTO=http://www.google.com
TAG POS=1 TYPE=INPUT:TEXT FORM=ID:post ATTR=ID:jessie CONTENT=1
TAG POS=1 TYPE=INPUT:BUTTON FORM=ID:post ATTR=NAME:random_button
TAB OPEN
TAB T=2
URL GOTO=http://www.google.com
TAG POS=1 TYPE=INPUT:TEXT FORM=ID:post ATTR=ID:jessie CONTENT=2
TAG POS=1 TYPE=INPUT:BUTTON FORM=ID:post ATTR=NAME:random_button
TAB OPEN
TAB T=3
URL GOTO=http://www.google.com
TAG POS=1 TYPE=INPUT:TEXT FORM=ID:post ATTR=ID:jessie CONTENT=3
TAG POS=1 TYPE=INPUT:BUTTON FORM=ID:post ATTR=NAME:random_button
TAB OPEN
TAB T=4
URL GOTO=http://www.google.com
TAG POS=1 TYPE=INPUT:TEXT FORM=ID:post ATTR=ID:jessie CONTENT=4
TAG POS=1 TYPE=INPUT:BUTTON FORM=ID:post ATTR=NAME:random_button
TAB OPEN
TAB T=5
URL GOTO=http://www.google.com 
TAG POS=1 TYPE=INPUT:TEXT FORM=ID:post ATTR=ID:jessie CONTENT=5
TAG POS=1 TYPE=INPUT:BUTTON FORM=ID:post ATTR=NAME:random_button