var array = [];
var key = 482;
var number = 1000;
for(i=0;i<number;i++){
array.push(i);
}
//-->>
var time = new Date();
var a;
var left = 0;
var right= array.length;
while(left<=right){
var center=Math.floor((left+right)/2);
if(array[center] == key) a = center;
if(key < array[center]){
right = center - 1;
}else{
left = center + 1;
}
}
alert("二分查找法搜索的结果:"+a);
alert((new Date() - time)/1000);