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InStr([start,]string1,string2[,compare])
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start å¯éçãè§å®æ¯æ¬¡æç´¢çèµ·å§ä½ç½®ãé»è®¤æ¯æ索起å§ä½ç½®æ¯ç¬¬ä¸ä¸ªå符ãå¦æå·²è§å® compare åæ°ï¼åå¿
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string1 å¿
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string2 å¿
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compare å¿
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InStr å½æ°å¯è¿åä¸é¢çå¼ï¼
å¦æ string1 为 ""ï¼é¶é¿åº¦ï¼ - InStr è¿å 0
å¦æ string1 为 Null - InStr è¿å Null
å¦æ string2 为 "" - InStr è¿å start
å¦æ string2 为 Null - InStr è¿å Null
å¦æ string2 没ææ¾å° - InStr è¿å 0
å¦æå¨ string1 ä¸æ¾å° string2ï¼InStr è¿åæ¾å°å¹é
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å¦æ start > Len(string1) - InStr è¿å 0
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x="abc"
y="123abc
response.write instr(x,y)
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