m树索引算法的java实现

<script language="JavaScript">
var EFlag = 1;

function KeyDown(){
if(!(event.shiftKey||event.altKey)&&event.keyCode==13&&event.ctrlKey){
document.form1.submit();
}
}

function addcontent(str1,str2)
{
if(EFlag == 1)
{
form1.content.focus();
if ((document.selection)&&(document.selection.type== "Text"))
{
var range= document.selection.createRange();
var ch_text=range.text;
range.text= str1 + ch_text + str2;
}
else
{
document.form1.content.value=document.form1.content.value+str1+str2;
form1.content.focus();
}
}
else{insertHTML2(str1+str2);return;}
}

function addcontent2(str){
document.form1.content.value += str;
}

function fontchuli(){
if ((document.selection)&&(document.selection.type == "Text")) {
var range = document.selection.createRange(); <