鼠标永远点不到按钮js代码

js代码

<script type=\"text/javascript\">
function f1(){
	alert(\"Yes. you are right \") 
} 
var flag=1;
function f(){ 
	var Bn = document.getElementById(\'Bn\');
	var aWidth= document.body.clientWidth || document.documentElement.clientWidth;
	var aHeight= document.body.clientHeight || document.documentElement.clientHeight;
	var sJs1=Math.floor(Math.random()*aHeight);
	var sJs2=Math.floor(Math.random()*aWidth);
	if(flag==1){
		Bn.style.top=sJs1 + \'px\';
		Bn.style.left=sJs2+\'px\'; 
		flag=2;
		
	}else if(flag==2){
		Bn.style.top=sJs1+\'px\';
		Bn.style.left=sJs2+\'px\';
		flag=3;
	}else if(flag==3){
	Bn.style.top=235 + \'px\';
		Bn.style.left=286 + \'px\';
		flag=4;
	}else if(flag==4){
		Bn.style.top=235 + \'px\';
		Bn.style.left=360 + \'px\';
		flag=1;
	}
}
function f2(){
		alert(\'你竟然点到了，厉害\');
	}
 </script>