function SearchValue(_this,status){
	if(status == 0){
		_this.className='key';
		if(_this.value==''){_this.value='产品搜索';}
	}else if(status == 1){
		_this.className='key Searchfocus';
		if(_this.value=='产品搜索'){_this.value='';}
	}
}
function showMsg(MsgBox,msgShut,lightBG){
	var bgObj=document.getElementById(lightBG);
	var msgObj=document.getElementById(MsgBox);
	bgObj.style.width=document.body.offsetWidth+"px";
	bgObj.style.height=document.documentElement.clientHeight+"px";
	bgObj.style.display="block";
//	window.onscroll=window.onresize=function(){
//		msgObj.style.top = Math.round((document.documentElement.scrollTop+(document.documentElement.clientHeight-300)/2))+"px";
//		bgObj.style.width=document.body.offsetWidth+"px";
//		bgObj.style.height=document.documentElement.scrollHeight+"px";
//	};
	msgObj.style.display="block";
	msgObj.style.top = Math.round((document.documentElement.scrollTop+(document.documentElement.clientHeight-300)/2))+"px";
	document.getElementById(msgShut).onclick=bgObj.onclick=function(){bgObj.style.display=msgObj.style.display="none";}
}