[方法]封装一个碰撞函数

你们感觉这个函数用在什么地方的呢？

function pz(obj1,obj2){
    var L1 = obj1.offsetLeft;
    var R1 = obj1.offsetLeft + obj1.offsetWidth;
    var T1 = obj1.offsetTop;
    var B1 = obj1.offsetTop + obj1.offsetHeight;
    var L2 = obj2.offsetLeft;
    var R2 = obj2.offsetLeft + obj2.offsetWidth;
    var T2 = obj2.offsetTop;
    var B2 = obj2.offsetTop + obj2.offsetHeight;
    if( R1R2 || T1>B2 || T2>B1 ){
        //碰不上 
        return false;
    }else{
        return true;
    }
}