function collapseBox(id){
	var box= id;
	var c=document.getElementsByClassName("c",box);
	if(c.length>0&&!c[0].blinding){
		c[0].blinding=true;
		if(c[0].style.display=="none"){
			Effect.BlindDown(c[0],{afterFinish:function(){
				c[0].blinding=false;
			},duration:0.1});
			// close others 
						
		}else{
			Effect.BlindUp(c[0],{afterFinish:function(){
				c[0].blinding=false;
			},duration:0.1});
		}
	}
}