function changeBack(buttonlink,content,number){
 var i=0;
 var buttonlinkpieces = document.getElementsByName(buttonlink);
 var contentpieces = document.getElementsByName(content);
	for(i=0;i<buttonlinkpieces.length;i++){
	buttonlinkpieces[i].background="";
	contentpieces[i].style.display="none";
	}
 buttonlinkpieces[number-1].background="images/sy_pic_btbg01.gif";
 contentpieces[number-1].style.display="block";
}

function changeBack1(buttonlink,content,number){
 var i=0;
 var buttonlinkpieces = document.getElementsByName(buttonlink);
 var contentpieces = document.getElementsByName(content);
	for(i=0;i<buttonlinkpieces.length;i++){
	buttonlinkpieces[i].bgColor="#FFFFFF";
	contentpieces[i].style.display="none";
	}
 buttonlinkpieces[number-1].bgColor="#FFA800";
 contentpieces[number-1].style.display="block";
}

function changeBack2(buttonlink,content,number){
 var i=0;
 var buttonlinkpieces = document.getElementsByName(buttonlink);
 var contentpieces = document.getElementsByName(content);
	for(i=0;i<buttonlinkpieces.length;i++){
	buttonlinkpieces[i].background="images/sy_pic_dhbg02.gif";
	contentpieces[i].style.display="none";
	}
 buttonlinkpieces[number-1].background="images/sy_pic_dhbg01.gif";
 contentpieces[number-1].style.display="block";
}


function changenews3(buttonlink,content,number){
 var i=0;
 var buttonlinkpieces = document.getElementsByName(buttonlink);
 var contentpieces = document.getElementsByName(content);
	for(i=0;i<buttonlinkpieces.length;i++){
	buttonlinkpieces[i].bgColor="#288CFE";
	contentpieces[i].style.display="none";
	}
 buttonlinkpieces[number-1].bgColor="#6DCDFF";
 contentpieces[number-1].style.display="block";
}