function join_onsubmit(){
	if(document.form1.truename.value == ''){
		alert('请输入您的姓名');
		document.form1.truename.focus();
		return false;
	}

	if(document.form1.phone.value == '-1'){
		alert('请输入电话');
		document.form1.phone.focus();
		return false;
	}
	return true;
}
function forum_onsubmit(){
	if(document.form1.truename.value == ''){
		alert('请输入您的姓名');
		document.form1.truename.focus();
		return false;
	}

	if(document.form1.email.value == '-1'){
		alert('请输入email');
		document.form1.email.focus();
		return false;
	}

	if(document.form1.mobile.value == '-1'){
		alert('请输入手机号码');
		document.form1.mobile.focus();
		return false;
	}
	return true;
}
function huandong(){
		var t1=document.getElementById("t1");
		var t2=document.getElementById("t2");
		var a1=document.getElementById("a1");
		var a2=document.getElementById("a2");
		if(t1.className=="aleft"){
			t1.className=""
			t2.className="aleft";
			a1.style.display="none";
			a2.style.display="block";
		}
		else{
			t1.className="aleft"
			t2.className="";
			a1.style.display="block";
			a2.style.display="none";
		}
		
	}
	
function scror(){
	var obj=document.getElementById("s_img");
	var h=function(){ 
		var obj_w=parseInt(obj.style.width);
		if(obj.scrollLeft<obj_w){
			obj.scrollLeft=(obj.scrollLeft+Math.ceil((obj_w-obj.scrollLeft)/15));
		}
		else{
		clearInterval(bw);
		}
	}	
	var bw=window.setInterval(h,1)
}
function scrol(){
	var obj=document.getElementById("s_img");
	var h=function(){ 
		var obj_w=parseInt(obj.style.width);
		if(obj.scrollLeft>1){
			obj.scrollLeft-=Math.ceil(obj_w)/50;
		}
		else{
		clearInterval(bw);
		}
	}	
	var bw=window.setInterval(h,1)
	//obj.scrollLeft-=parseInt(obj.style.width);
}

var c=1;
		function init(){
		if(c<4){
		qiehuan(c);
		c++;
		}else{
		c=1;
		qiehuan(c);
		}
		
		}
	function qiehuan(id){
		for(i=1;i<=3;i++){
				document.getElementById("aa"+i).className=" ";
				document.getElementById("b"+i).style.display="none";
			if(id==i){
				document.getElementById("aa"+i).className="onmouseon";
				document.getElementById("b"+i).style.display="block";
			}
		}
	}// JavaScript Document