关键词高亮显示

网上很多都是单个关键字的全文突出显示，始终不符合要求.

1.

function HighLight(nword){
     if(nword!=''){
       var keyword=document.body.createTextRange();
       while(keyword.findText(nword)){
         keyword.pasteHTML("<span style='color:red;'>"+keyword.text+"</span>");
         keyword.moveStart("character",1);
       }
     }
   }
function highword(nword){
     var array=nword.split(",");
     for(var i=0;i<array.length;i++){
       HighLight(array[i]);
     }
   }

2.正则表达式处理

function highLight(ele,keys)
{
  var reg = new RegExp("(" + keys.replace(/,/,"|") + ")","g"); 
  ele.innerHTML = ele.innerHTML.replace(reg,"<font color=\"red\">$1</font>");
} 
window.onload = function()
{
  highLight(document.getElementsByTagName("p")[0],"li,jin");
}

3.

<input type="button" value="clck" onclick="test2('a3');"/>
<script language="javascript">
function test()
{
document.location.href = "DBAI_les20_globalization_support.ppt";
}
function test2(name)
{
if(document.all)
{
document.getElementById(name).click();
}
else
{
var evt = document.createEvent("MouseEvents");
evt.initEvent("click", true, true);
document.getElementById(name).dispatchEvent(evt);
}
}
</script>