//使用onload=DrawImage(this,长,宽);
function DrawImage(ImgD,w,h){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= w/h){
if(image.width>w){
ImgD.width=w;
ImgD.height=(image.height*w)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
//ImgD.alt=image.width+"×"+image.height;
}
else{
if(image.height>h){
ImgD.height=h;
ImgD.width=(image.width*h)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
//ImgD.alt=image.width+"×"+image.height;
}
}
}


/*留言信息审核*/
function checkmessage()
{
	if(document.getElementById("title").value=="")
	{  
	    alert("请填写标题!");
		document.getElementById("title").focus();
		return false;
	}

	if(document.getElementById("content").value=="")
	{  
	    alert("请输入内容!");
		document.getElementById("content").focus();
		return false;
	}
		if(document.getElementById("linkman").value=="")
	{  
	    alert("请填写您的姓名!");
		document.getElementById("linkman").focus();
		return false;
	}
	

	if(document.getElementById("mobiletel").value=="")
	{  
	    alert("请输入手机号码!");
		document.getElementById("mobiletel").focus();
		return false;
	}
	var re = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/
	var patrn = /^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$/; 
	if(patrn.test(document.getElementById("mobiletel").value)==false)
	{  
	    alert("手机号码格式不正确!");
		document.getElementById("mobiletel").focus();
		return false;
	}
	
    if(document.getElementById("email").value=="")
	{  
	    alert("请输入电子邮箱!");
		document.getElementById("email").focus();
		return false;
	}
 	if(re.test(document.getElementById("email").value)==false)
	{  
	    alert("电子邮箱格式不正确!");
		document.getElementById("email").focus();
		return false;
	}
else
{
	return true;}
	
	}