var D_chengYesOrNo = 0;
var disappeardelay=150;
function D_cheng(num){
	if (D_chengYesOrNo == 0){return false;}
	dt_div1.style.display="none";
	dt_div2.style.display="none";
	dt_div3.style.display="none";
	if (num==1){
		dt_div1.style.display="block";
	}
	if (num==2){
		dt_div2.style.display="block";
	}
	if (num==3){
		dt_div3.style.display="block";
	}
	D_chengYesOrNo = 0;
}
function D_cheng_Over(Num){
	D_chengYesOrNo=1;
	delayhide=setTimeout("D_cheng(" + Num + ")",disappeardelay);
}
function D_cheng_Out(){
	D_chengYesOrNo=0;
	clearTimeout(delayhide);
}