【www.gdgbn.com--百度指南】

var t = settimeout("javascript statement",milliseconds);

  
<script language="javascript" type="text/javascript">  
   
function delayedalert(){        
settimeout("alert("this alert was delayed");",3000);     
}      
function normalalert(){        
alert("no timeout");    
 }  
</script> 
 
 no timeout  
 delayed alert

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