var BgArray = new Array( 
	"./images/main_0.swf", 
	"./images/main_1.swf"
	); 
	var gifimage=""; 
	var picfolder="./"; 
	today=new Date(); 
	jran=today.getTime(); 
	ia=9301; 
	ic=49297; 
	im=233280; 
	jran = (jran*ia+ic) % im; 
	gifimage = picfolder+BgArray[ ( Math.ceil((jran/(im*1.0)) 
	*BgArray.length) ) - 1]; 
	
	
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