var value = 0;
value = parseInt(Math.random()*(4-1+1));
if(value==0){
	document.write('<a   href="http://tk.bengou.com/2010/07/0xfbb0yqhbxgzqbb_1277949734326/3.html" target="_blank"><img src="http://pic2.bengou.com/advertise/srcfold/1280890121437.jpg"  width="202" height="231" /></a>');
}else if(value==1){
	document.write('<a   href="http://tk.bengou.com/2010/07/0xfbb0yqhbxgzqbb_1277949734326/3.html" target="_blank"><img src="http://pic2.bengou.com/advertise/srcfold/1280890121437.jpg"  width="202" height="231" /></a>');
}else if(value==2){
	document.write('<a   href="http://www.bengou.com/" target="_blank"><img src="http://pic2.bengou.com/advertise/srcfold/1265702321281.gif"  width="202" height="231" /></a>');
}else if(value==3){
	document.write('<a   href="http://www.5253.com/roco/?bengou" target="_blank"><img src="http://pic2.bengou.com/advertise/srcfold/1283825549262.gif"  width="202" height="231" /></a>');
}