if(window.screen.width>1024){document.write("<style type=\"text/css\">body{margin-left:"+(window.screen.width-1003)/2+"px}</style>");}


function mengren1(){
document.getElementById("left_mengren1").style.display="block";
document.getElementById("left_mengren2").style.display="none";
}
function mengren2(){
document.getElementById("left_mengren1").style.display="none";
document.getElementById("left_mengren2").style.display="block";
}

function dongfang1(){
document.getElementById("left_dongfang1").style.display="block";
document.getElementById("left_dongfang2").style.display="none";
}
function dongfang2(){
document.getElementById("left_dongfang1").style.display="none";
document.getElementById("left_dongfang2").style.display="block";
}