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1. document.formName.item("itemName") ÎÊÌâ
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4.eval("idName")ÎÊÌâ
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function Submitted(evt) {
evt=evt?evt:(window.event?window.event:null);
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9.event.xÓëevent.yÎÊÌâ
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e.g. undefined==null
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