

具体代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML> <HEAD> <TITLE> New Document </TITLE> <META NAME="Generator" CONTENT="EditPlus"> <META NAME="Author" CONTENT=""> <META NAME="Keywords" CONTENT=""> <META NAME="Description" CONTENT=""> <script type="text/javascript" src="jquery.js"></script><script type="text/javascript">/*自动下拉补全 zhk */var highlightindex=-1;//当前高亮的节点 $(document).ready(function(){ var wordInput=$("#word"); var wordInputOffset=wordInput.offset(); $("#auto").hide().css("border","1px black solid").css("position","absolute").css("top",wordInputOffset.top+wordInput.height()+5+"px").css("left",wordInputOffset.left+"px").width(wordInput.width()+2);wordInput.keyup(function (event){ var myEvent=event||window.event;var keyCode=myEvent.keyCode;if(keyCode>=65&&keyCode<=90||keyCode==8||keyCode==46){var wordText=$("#word").val(); var autoNode=$("#auto"); if(wordText!=""){ var wordNodes=$("span");autoNode.html("");wordNodes.each(function(i){ var wordNode=$(this); var newDivNode=$("<div>").attr("id",i); newDivNode.html(wordNode.text()).appendTo(autoNode); newDivNode.mouseover(function(){//鼠标进入if(highlightindex!=-1){$("#auto").children("div").eq(highlightindex).css("background-color","white"); } highlightindex=$(this).attr("id"); $(this).css("background-color","red");}) newDivNode.mouseout(function(){//鼠标移除 $(this).css("background-color","white"); })newDivNode.click(function(){//点击 var comText=$(this).text(); $("#auto").hide(); highlightindex=-1; $("#word").val(comText); }) })if(wordNodes.length>0){ autoNode.show();}else{ autoNode.hide(); highlightindex=-1; }}else{ autoNode.hide();highlightindex=-1;}}else if(keyCode==38||keyCode==40){ if(keyCode==38){//向上var autoNodes=$("#auto").children("div"); if(highlightindex!=-1){autoNodes.eq(highlightindex).css("background-color","white"); highlightindex--; }else{highlightindex=autoNodes.length-1; }if(highlightindex==-1){highlightindex=autoNodes.length-1; } autoNodes.eq(highlightindex).css("background-color","red"); } if(keyCode==40){var autoNodes=$("#auto").children("div"); if(highlightindex!=-1){autoNodes.eq(highlightindex).css("background-color","white"); } highlightindex++; if(highlightindex==autoNodes.length){highlightindex=0; } autoNodes.eq(highlightindex).css("background-color","red"); } }else if(keyCode==13){ if(highlightindex!=-1){ var comText=$("#auto").hide().children("div").eq(highlightindex).text(); highlightindex=-1; $("#word").val(comText); }else{alert("文本框中的【"+$("#word").val()+"】被提交了");$("#auto").hide(); $("#word").get(0).blur();//失去焦点 }}}); $("input [type="button"]").click(function(){ alert("文本框中的【"+$("#word").val()+"】被提交了");});})</script> </HEAD><BODY> <input type="text" id="word"><input type="button" value="提交"><div id="auto"></div><p><span>aaa</span><span>abc</span><span>abd</span><span>bbc</span><span>beb</span><span>cer</span><span>erd</span><span>beg</span><p> </BODY></HTML>以上就是本文的全部内容,希望对大家学习javascript程序设计有所帮助。