function checkInput(strtype){
	if (strtype=="find"){
		if (document.getElementById("coursename").value==""){
			alert("请输入您要找的课程名！");
			document.getElementById("coursename").focus();
			return false;
		}
	}

	if (document.getElementById("username").value==""){
		alert("请输入您的姓名！");
		document.getElementById("username").focus();
		return false;
	}else if(document.getElementById("tel").value=="" || document.getElementById("tel").value=="请输入您的手机/固话/小灵通号码"){
		alert("请留下您的联系电话！以便老师能直接解答您的问题！");
		document.getElementById("tel").focus();
		return false;
	}else if(document.getElementById("province").value=="0" || document.getElementById("province").value==""){
		alert("请输入您要求的省份！");
		return false;
	}else if(document.getElementById("city").value=="0" || document.getElementById("city").value==""){
		alert("请输入您要求的城市！");
		return false;
	}else{
		return true;
	}
}

function checktxt(obj){
	if (document.getElementById(obj).value=="请输入您的手机/固话/小灵通号码"){
		document.getElementById(obj).value="";
		document.getElementById(obj).className="inputtext";
	}else if(document.getElementById(obj).value==""){
		document.getElementById(obj).value="请输入您的手机/固话/小灵通号码";
		document.getElementById(obj).className="inputtext1";
	}
}