var t;
var t2;
var p = "q";
var p2 = "q2";
var y = 470;
var y2 = 470;
var q = 0;
var q2 = 0;
var g = 0;
var g2 = 0;

function changeheight(){
 if(y>945&&g==0){g=1;return;}
 if(y<470&&g==1){g=0;return;}
 if(g)q=-5;if(!g)q=5;y=y+q;
 e=document.getElementById("u");
 e.style.height = y + 'px';
 t=setTimeout("changeheight();",0);
}
function changeheight2(){
 if(y2>945&&g2==0){g2=1;return;}
 if(y2<470&&g2==1){g2=0;return;}
 if(g2)q2=-5;if(!g2)q2=5;y2=y2+q2;
 e2=document.getElementById("u2");
 e2.style.height = y2 + 'px';
 t=setTimeout("changeheight2();",0);
}