javascript实现划词标记+划词搜索功能_javascript技巧

document.body.onload=adddiv;
document.onmousedown=recordobj;
document.ondblclick=dbclick;
document.onmouseup=showselect;
var starobj,isdb=false,allow=true;

function isallow()
{
if(allow){
allow=false;
alert('is closed');
}
else{
allow=true;
alert('is opend');
}

}

function dbclick()
{
isdb=true;
}
function recordobj()
{
starobj=event.srcElement;
}
function showselect() {
var str="";
if(event.srcElement.tagName!="A"&&event.srcElement.tagName!="INPUT"&&event.srcElement==starobj&&!isdb&&allow)
{
var oText=document.selection.createRange();

if(oText.text.length>0)
{
str=oText.text;
oText.text="BuB"+oText.text+"EuE";
}

oText.select();
event.srcElement.innerHTML=event.srcElement.innerHTML.replace("BuB","").replace("EuE","");

}

searchgoogle(str)
isdb=false;
}

function searchgoogle(str)
{
var obj=document.getElementById("searchgoogle");
if(str.length>0)
{
obj.style.display="block";
obj.style.position="absolute";
obj.style.zindex=999;
obj.style.posTop=document.body.scrollTop+event.y-25;
obj.style.posLeft=document.body.scrollLeft+event.x+5;
obj.style.widht=80;
obj.innerHTML="Search It！";

}
else
{
obj.style.display="none";
}
}

function adddiv()
{
var mobj = document.createElement("div");

mobj.id="searchgoogle";

document.body.appendChild(mobj);
}

//-->

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在页面中加上这串代码就行了，同时还有搜索功能。演示效果就请看本BLOG页面上用鼠标划选文字的效果

没来得及整理代码，看上去有点乱。