复制代码 代码如下:<SCRIPT language=JScript type=text/javascript> var isOpera = navigator.userAgent.indexOf("Opera") > -1; var isIE = navigator.userAgent.indexOf("MSIE") > 1 && !isOpera; var isMoz = navigator.userAgent.indexOf("Mozilla/5.") == 0 && !isOpera; function textboxSelect (oTextbox, iStart, iEnd) { switch(arguments.length) { case 1: oTextbox.select(); break; case 2: iEnd = oTextbox.value.length; /* falls through */ case 3: if (isIE) { var oRange = oTextbox.createTextRange(); oRange.moveStart("character", iStart); oRange.moveEnd("character", -oTextbox.value.length + iEnd); oRange.select(); } else if (isMoz){ oTextbox.setSelectionRange(iStart, iEnd); } } oTextbox.focus(); } /* function textboxReplaceSelect (oTextbox, sText) { if (isIE) { var oRange = oTextbox.createTextRange(); oRange.text = sText; oRange.collapse(true); oRange.select(); } else if (isMoz) { var iStart = oTextbox.selectionStart; oTextbox.value = oTextbox.value.substring(0, iStart) + sText + oTextbox.value.substring(oTextbox.selectionEnd, oTextbox.value.length); oTextbox.setSelectionRange(iStart + sText.length, iStart + sText.length); } oTextbox.focus(); } */ function autocompleteMatch (sText, arrValues) { for (var i=0; i < arrValues.length; i++) { if (arrValues[i].indexOf(sText) == 0) { return arrValues[i]; } } return null; } function autocomplete(oTextbox, oEvent, arrValues) { switch (oEvent.keyCode) { case 38: //up arrow case 40: //down arrow case 37: //left arrow case 39: //right arrow case 33: //page up case 34: //page down case 36: //home case 35: //end case 13: //enter case 9: //tab case 27: //esc case 16: //shift case 17: //ctrl case 18: //alt case 20: //caps lock case 8: //backspace case 46: //delete return true; break; default: // 下面这一行用处不大(被注释) //textboxReplaceSelect(oTextbox, isIE ? oTextbox.value/*oEvent.keyCode*/ : oEvent.charCode); var iLen = oTextbox.value.length; var sMatch = autocompleteMatch(oTextbox.value, arrValues); if (sMatch != null) { oTextbox.value = sMatch; textboxSelect(oTextbox, iLen, oTextbox.value.length); } return false; } } </SCRIPT> <SCRIPT> var arrValues = ["red", "orange", "yellow", "green", "blue", "indigo", "violet", "brown"]; </SCRIPT> <H2>Autocomplete Textbox Example</H2> <P>Type in a color in lowercase:输入一个以小写字母开头的颜色(英文单词，比如：r、 b等)<BR><INPUT id=txt1 onkeyup="return autocomplete(this, event, arrValues)"></P>

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